My boyfriend never fails to mention his exes, I am going crazy

​tl;dr: Boyfriend constantly projects his past trauma onto me by banning anything (gifts, shows, hobbies) that reminds him of his exes, making me feel like I can't be myself

So, me (19F) and my bf (20M) have been together for nearly a year now, and since the very start one thing was clear - he ALWAYS had to mention an ex. It was literally one of our first bigger conversations, his past and how much they hurt him. Now I truly get it, he was hurt by something from the last but he never lets it go..

For example, he highly refuses to buy me a Cinnamoroll plushie (my fav) because one of his exes also loved Sanrio, Kuromi to be exact. Whenever we pass by Sanrio plushies or claw machines he deliberately looks elsewhere and buys me random plushies which are, sorry, not even close to what I like. He called me a "manipulator" because of some of my interests because yeah, your shitty ex loved a Pokemon so now I am the problem.

I also told him countless times I loved peonies, yet I always get roses - and don't ask me how I found out but I did that guess what? Yeah his ex loved peonies too.

When a new season of a show we both liked came on, he did not want to watch it with me because the first one he watched with an ex.

When a certain heartbreak or love song comes on (a few actually) he demands I turn it off immediately

Now, the "ex" issued is usually the same girl, but from time to time there are variations and I think that's why it pisses me off more, lol.

I just feel like I can't be myself around him and pretend to like things I don't so he doesn't get "triggered", and I implied millions of times what I want and what I like, and I get bullshit.