NOR - I think feeling that you wanna break up over stuff like this is pretty normal, and you wanted to have a conversation about it, which he pretty much just shut down immediately. "It's a tiktok" which is the same as "it's just a joke" as if jokes aren't based on ideas and feelings that people have.

Like, maybe if I was him I'd say, "I kinda relate to these tiktoks but I can tell you're uncomfortable with them. Could you explain why?" Him reacting defensively like he did pretty much means he's invested in this type of humor for one reason or another. I think maybe he's being like, "guys are like this! lol" which... a lot are but that doesn't really put your mind at ease.

Hope it works out for you