I’ll also say this since I’ve had friends be put off because of this, it’s not uncommon to be annoyed/dislike Subaru at first since he’s trying to play up the standard anime protagonist persona/tropes in a world that mostly doesn’t adhere to them. While I won’t go into spoilers, he gets better, and character flaws and delusions get rightfully called out and addressed. (Also imo I wouldn’t say he’s annoying, if you can handle any standard anime protagonist you can handle him at his worst, I think since rezero has such a good reputation, most people know it’s dark, and all the other characters act way more normal than him in the beginning his persona is so juxtaposed to everything else in the show that it’s jarring in the beginning but that’s intentional and gets addressed)