AITAH for breaking up with my boyfriend because of his weird fetish?

My 21F boyfriend 23M has the weirdest sexual fetish I’ve honestly seen in my life, whenever we have sex he keeps insulting my dad and brothers and keeps calling them cucks and pathetic, I love dad and my brothers they’re amazing, but my boyfriend has this fetish where he loves being the most dominant man in my life and that he has dominance over my dad and brothers, other than all that sex stuff he’s a good boyfriend.
I’ve tried talking to him about it and nothing changed, last week we were having sex at his place and he kept calling me a daughter of a dog and I just had enough, the next day I broke up with him, now ever since then he and most of our mutual friends have been attacking me saying I’m overreacting and that it’s just a dumb joke but like I’ve told him many times to stop it and that I don’t like it but he kept calling dad a dog and that was not okay whatsoever.
But am I an asshole here? With how everyone is attacking me and telling me I’m overreacting I’m beginning to doubt myself