“Catholicism is a religion of control freaks”.
You’re only baptised once. You were baptised Catholic. Take it up with the Lord on Judgement Day.
There is no baptism into a denomonation, only into Christ. It is an interesting question whether a person baptized while believing a false Gospel has a legitimate baptism. I don’t see how that holds up. In the NT, every Christian baptism was of those who professed the true faith (though some professed it insincerely). In no case is there an example of a NT baptism into Christ of anyone professing a false Gospel, nor of anyone too young or too incompetent to profess faith in Christ.
Logically then, if someone was raised to trust in their own righteousness, or in the merits of some human system, and they later come to realize they were misled, and choose at that time to be baptized into Christ, that would be their first legitimate baptism, as the purveyors of a false Gospel have no authority to administer baptism anyway.
Bottom line, God will keep track of the technicalities. Our main job is to always look to Him in faith, and not ourselves. After all, that is the testimony of baptism, that we have died to the law of sin and death, and been raised into newness of resurrection life in Christ, all because of Him.
Peace,
SR