Of course man can be wrong. We do our best and by God's grace we are forgiven.
There are many church's out there. If RC is not for you, why not pray and ask for guidance?
Sounds like you are desperate for God to enter your heart. Instead of ranting and chastising..... try opening up the Bible and your heart and start praying.
God can do marvelous things!
To be honest with you, I find it far more refreshing and enlightening to read the Bible, and passages from it, without going to church and having people tell me what I aM reading. I know what I am reading, and don't need people to tell me if I eat meat on a Friday (as an example of course), that I have committed a sin.
We as people commit many more serious sins we should focus on rather than breaking man-made rules with no real substance.
To me, the person who screws others as a course of practice in business is far far worse than someone who misses mass but is an otherweise decent person.