We are both in our 20's.
Everything was fine for a year.
He got interested in Christianity (at first Eastern Orthodoxy, now Catholic). He has been involved in it for two years out of the three years we have been together now. I up front said, when he first took interest in it two years ago, that I did not know if I could stay with him if he got very into it, because I think Christianity is very detrimental towards women. He persisted. I made some effort to learn alongside him, but only came to dislike it more.
I have become increasingly resentful towards him. I have gone rounds with him over "look at this verse; look at what this forces me to be", "look at what this priest, pope, saint, theologian, philospher says about women" with increasing personal attacks towards him that he does not care because it does not impact him as it does me. I became increasingly resentful and desperate. It has colored my view of him as hateful and wrong. It has damaged my willingness to trust him. It has caused me to act unkind towards him. I have yelled at him. I have called him an asshole. I have told him I hate him.
*sidenote: I was already concerned about his behavior towards women. Prior to us meeting he had listened to some MGTOW stuff, he had made some poor jabs at me related to being female multiple times even after I made it clear that was a sore spot for me, and had said things like women can't make art that doesn't reference themselves, women only follow what men do, etc. Mix this with the newfound interest in feverent Catholicism and it makes me insecure in whether or not he respects me or regards me as fully human rather than just a "helpmeet" for men.
Also: he periodically tells me he wants to break up/stop talking forever. He disappears for a while, blocks me where he can, etc. Even if I don't push him or maintain any contact, he later returns on his own and says he likes being around me. I don't know what this means. It's been happening cyclically for a year now.