We have to look at God's word, the bible, as our complete guide for everything in life as well as what constitutes the true and acceptable nature of the church, including its organization, practices, teachings, etc.; if it deviates from the bible in any way, by adding, deleting, or changing things as opposed to what's strictly contained therein, then it can't be right or acceptable to God, and furthermore, may in fact be false to the extent that persons believing in and practicing such falsehoods may not in fact even be Christians at all (nor saved)! This is where I find the Catholic church to be, and many, many, others as well, including sisters or offshoots thereof such as Episcopalian, Anglican, Greek Orthodox, etc. and others too of unrelated denominations. There are no denominations in true Christianity as discussed and warned against subtly by Paul in the 1st Corinthians letter, ref.1Cor 1:12.
Facts of the bible:
All Christian's are saints (1st Corinthians 1:2, Colossians 1:2, Eph 1:1, etc, as referenced elsewhere as well)
No Pope can be found in the bible, nor cardinals or other similar related unscriptural church office titles or positions
Christ is the head of the church not the pope (Eph 5:23. Col1:18)
No man on earth is to be called father, which reverence is reserved for the Father in heaven (Mat 23:9)
There is no lay nor hierarchy other than elders (presbytery, bishops, pastors, all meaning the same) deacons, teachers, preachers, ministers
All Christian's are priests (1st Peter 2:9)
Women have no role or official authority in the church (1Timothy 2:12, 1Corinthians 14:34-35)
There is no such thing as 1st holy communion (after-the-fact confirmation of an infant "baptism" based on the person's subsequent confession of belief)
Baptism (which is a total immersion in water), is administered to only believing adults or persons of accountable age immediately upon their belief and confession in Jesus as the Son of God, for the remission of sins (Acts 2:38, and read all the conversions in the book of Acts.)
There are no accounts recorded of babies, infants, children being baptized or sprinkled, nor any believing adults being sprinkled as a form of, or substitution for baptism. Sprinkle and baptize are 2 distinctly different words in the Greek language, with baptism being transliterated not translated, meaning dipping, immersion, plunging and not pouring, sprinkling or anything other than complete submersion in water)
There is no worship of Mary or any other person other than Jesus Christ, nor instances of acceptable prayer to anyone other than Jesus as an intermediary between man and God (1st Tim 2:5)
There are no symbols to be held in any regard such as the cross, vessels, relics, statues, making the sign of the cross, rosaries, etc.
There are no religious holidays found in the bible or days to be revered other than the first day of the week (Sunday) when the disciples came together to break bread and have communion with the Lord, Acts 20:7)
There is no higher earthly authority over congregations of believers other than that which is to be established within the individual, local congregations, i.e., elders and related workers such as deacons, ministers/preachers
There is no condemnation for or abstaining from eating meats (ref. Colossians 2:16, 1Timothy 4:3)
There are no restrictions for marriage of priests (also we are all priests according to God's word as noted above), and ref. qualifications for church offices of bishops and deacons in 1Timothy 3:2 and 3:12, Titus1:6, "husband of one wife")
Marriage is between a man and a woman, and homosexuality is an abomination in the eyes of God.