I do not remember where I found this concise article showing the scriptures that IMHO disprove the PTR. I too was, for a couple of decades was also a proponent of it, and sadly taught others in it

I now see it as an escapism theology.
"Why I no longer believe in a pretrib rapture...it isn't biblical:
Many people stop believing in the Pre-Tribulation Rapture (Pre-Trib) by seeing that scripture points to one return of Jesus, not two (Rapture then Second Coming), often citing that verses about the "last trumpet" (1 Cor 15:52) and meeting Christ in the air (1 Thess 4:17) describe the end of the tribulation, not before, with passages like Matthew 24 and Revelation 20 suggesting the resurrection and gathering of believers happens after tribulation, with the "falling away" (2 Thess 2:3) and revealing of the Antichrist happening before the Day of the Lord, meaning Christians will face the Great Tribulation as the "first resurrection" (Rev 20:5) is post-tribulation, challenging the idea of an imminent, secret escape before it. Here are key scripture-based reasons: One Return, Not Two: The Bible describes one single, visible return of Christ, not a secret rapture followed by a public second coming seven years later. Matthew 24:29-31: Says the coming of the Son of Man happens immediately after the tribulation, with the gathering of the elect. Revelation 20:5: Calls the resurrection of believers "the first resurrection," implying it occurs after the tribulation mentioned in the preceding chapters, not before. The Falling Away & Man of Sin: Scripture links the coming of the Lord with specific events that must happen first. 2 Thessalonians 2:3: "That day will not come unless the rebellion occurs and the man of lawlessness is revealed, the man doomed to destruction". This suggests the Antichrist must appear before the Day of the Lord. The Trumpet & Resurrection: The "last trumpet" and the gathering in the air are seen as happening at the end. 1 Corinthians 15:51-52: "In a flash, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised incorruptible, and we shall be changed". 1 Thessalonians 4:16-17: The voice, archangel, and trumpet sound as the Lord descends, bringing the dead with Him, consistent with a post-tribulation return, not a secret, pre-trib event. The "Taken" & "Left" in Matthew/Luke: These passages are often interpreted as the wicked being "taken" to judgment and believers "left" to face the coming King, the opposite of the Pre-Trib view. No Separate "Wrath" for Saints: The Bible teaches believers will go through the tribulation, enduring its hardships, rather than being removed from it, as seen in Revelation's seals and the warnings to persevere."
Now, I have many friends and family members who are huge proponents of the PTR and I love all of them dearly. My only objection is that those they teach this to (esp. their children) could be teaching them in error. What is so hard about looking at the other side of things and praying about what they should be teaching...especially those who are "certain" of this doctrine. Just teach both sides and let the chips fall where they may?