In the 5th Trumpet of Revelation 9, the “falling star” symbolizes the unfaithful church — the fallen messenger — who opens the bottomless pit because of her rebellion. This ties directly to God's warning in Revelation 2, where He says that if the Church does not remember from where she has fallen, judgment will come.
By opening this “bottomless pit,” the fallen church unleashes spiritual chaos — a symbolic Pandora’s box. The “smoke” that rises from the pit represents false doctrine, which darkens the “sun” (symbolizing Christ) and the “air” (the Holy Spirit). This false teaching clouds spiritual truth and leads to widespread deception. Righteousness becomes unrighteousness. The one ruling this pit is Satan himself, not in angelic form, but as a spirit. He is Apollyon (Greek) or Abaddon (Hebrew), both meaning destruction. He doesn't send Apollyon — he "is" Apollyon and Abaddon. He is the king over this demonic host and brings spiritual death to the unsealed, unfaithful within the congregation as he is going to force them to receive his mark - the mark of the beast.
Most of what you say in this post I don't agree with, but I partially agree with the above part, because the metaphor in scripture is always constant:
THE SUN
The heavens declare the glory of God; and the firmament sheweth his handywork. Day unto day uttereth speech, and night unto night sheweth knowledge. There is no speech nor language, where their voice is not heard. Their line is gone out through all the earth, and their words to the end of the world.
In them hath he set a tabernacle for the sun, Which is as a bridegroom coming out of his chamber, and rejoiceth as a strong man to run a race. His going forth is from the end of the heaven, and his circuit unto the ends of it: and there is nothing hid from the heat thereof. (Psalms 19:1-6)
For from the rising of the sun even unto the going down of the same my name shall be great among the Gentiles; and in every place incense shall be offered unto my name, and a pure offering: for my name shall be great among the heathen, saith the LORD of hosts. (Malachi 1:11)
The mighty God, even YHWH, hath spoken,
and called the earth from the rising of the sun unto the going down thereof. Out of Zion, the perfection of beauty, God hath shined. (Psalms 50:1-2)
But unto you that fear my name
shall the Sun of righteousness arise with healing in his wings; and ye shall go forth, and grow up as calves of the stall. (Malachi 4:2)
THE SUN AND THE MOON
Psalms
89:3-4 &
35-37
I have made a covenant with my chosen, I have sworn unto David my servant, Thy seed will I establish for ever, and build up thy throne to all generations. Selah. Once have I sworn by my holiness that I will not lie unto David. His seed shall endure for ever, and
his throne as the sun before me. It shall be established for ever
as the moon, and as a faithful witness in heaven. Selah.
Isaiah 30:26 (Metaphor and Hyperbole):
Moreover the light of the moon shall be as the light of the sun, and the light of the sun shall be sevenfold, as the light of seven days, in the day that the LORD bindeth up the breach of his people, and healeth the stroke of their wound.
THE STARS
And he brought him forth abroad, and said, Look now toward heaven,
and tell the stars, if thou be able to number them: and he said unto him,
So shall thy seed be. And he believed in YHWH; and he counted it to him for righteousness. (Genesis 15:5-6)
That in blessing I will bless thee, and in
multiplying I will multiply thy seed as the stars of the heaven, and as the sand which is upon the sea shore; and thy seed shall possess the gate of his enemies; And in thy seed shall all the nations of the earth be blessed; because thou hast obeyed my voice. (Genesis 22:17-18).
And he dreamed yet another dream, and told it his brethren, and said, Behold, I have dreamed a dream more; and,
behold, the sun and the moon and the eleven stars made obeisance to me. And he told it to his father, and to his brethren: and his father rebuked him, and said unto him, What is this dream that thou hast dreamed?
Shall I and thy mother and thy brethren indeed come to bow down ourselves to thee to the earth? (Genesis 37:9-10)
And there appeared a great wonder in heaven;
a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars. (Revelation of John 12:1)
Zebulun and Naphtali were a people that jeoparded their lives unto the death in the high places of the field. The kings came and fought, then fought the kings of Canaan in Taanach by the waters of Megiddo; they took no gain of money.
They fought from heaven; the stars in their courses fought against Sisera. (Judges 5:18-20)
And they that be wise shall shine as the brightness of the firmament; and they that turn many to righteousness
as the stars for ever and ever. (Daniel 12:3)
TRIBULATION COMING UPON THE SAINTS
Daniel 8:9-10
"And out of one of them came forth a little horn, which waxed exceeding great, toward the south, and toward the east, and toward the pleasant land. And it waxed great, even to the host of heaven;
and it cast down some of the host and of the stars to the ground, and stamped upon them."
It's talking about Antiochus IV Epiphanes' and his war against the saints, i.e the Jews of his time, and the apostasy ("falling from the heavens") of many Jews which took place at the time: Antiochus IV Epiphanes
placing an abomination of desolation in the holy place is the chief biblical type of the man of sin of 2 Thessalonians Chapter 2.
Revelation 6:13-14
And the stars of heaven fell unto the earth, even as a fig tree casts her untimely figs, when she is shaken of a mighty wind. And the heaven departed as a scroll when it is rolled together; and every mountain and island were moved out of their places.
And white robes were given unto every one of them; and it was said unto them, that they should rest yet for a little season, until their fellowservants also and their brethren, that should be killed as they were, should be fulfilled. And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake;
and the sun became black as sackcloth of hair, and the moon became as blood; And the stars of heaven fell unto the earth, even as a fig tree casteth her untimely figs, when she is shaken of a mighty wind. (Revelation 6:11-13)
Behold, the day of the LORD cometh, cruel both with wrath and fierce anger, to lay the land desolate: and he shall destroy the sinners thereof out of it.
For the stars of heaven and the constellations thereof shall not give their light: the sun shall be darkened in his going forth, and the moon shall not cause her light to shine. (Isaiah 13:9-10)
Immediately after the tribulation of those days shall
the sun be darkened, and the moon
shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken: (Matthew 24:29)
THE AIR
The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit. John 3:8
So likewise ye, except ye utter by the tongue words easy to be understood, how shall it be known what is spoken?
for ye shall speak into the air. (1 Corinthians 14:9)
Wherein in time past ye walked according to the course of this world, according to
the prince of the power of the air, the spirit that now worketh in the children of disobedience: (Ephesians 2:2)
And he opened the bottomless pit; and there arose a smoke out of the pit, as the smoke of a great furnace;
and the sun and the air were darkened by reason of the smoke of the pit. (Revelation 9:2)
And they had a king over them, which is the angel of the bottomless pit, whose name in the Hebrew tongue is Abaddon, but in the Greek tongue hath his name Apollyon. (Revelation 9:11)