Thats quite the accusation and I am pretty sure its not true. Same as Brian Johnson does not hate Star Wars. But fans tend to project a lot when the relationship with their beloved franchise is disrupted.
Yeah same with The Witcher tv series. We got two ridiculous narratives out of that, firstly that Cavill was a nasty and hateful person to the rest of the crew, which seems to have been made up by a guy with like 50 followers on Twitter (and zero connection to or knowledge of the show), and then alt-right psychos flipped this around and said Cavill "rightfully" hated the "Woke" (lol?!) show and was in huge conflict with the showrunners . Neither has any supporting evidence, and both a ton of evidence against them, not least that people who worked on the show, even the showrunner, spoke fondly about Cavill, but awful Witcher fans/haters (I mean, is there a difference?), to this day, repeat both as if they were gospel truth. It all seems to stem from an intentional misrepresentation of a comment from one of the writers or the showrunner after S1 that Cavill sometimes came to them with lore tidbits that he thought should be included or modified in the script (which is, like, pretty normal).
(There's also the claim that he got fired because he was bad/quit because the show was too far from the books - both of which seem implausible. Whereas we know from actual reporter-done reporting that Cavill was told by his then-manager, The Rock's ex (I forget her name) who was on good terms with The Rock (then a "big deal" in the DCU thanks to the Black Adam movie, not yet a flop I believe), that he'd got the part in a new Superman movie, that it was a done deal, a fact, just hadn't been done on paper yet (Hollywood!!!), and he needed to make time in his schedule for that, and that's exactly what the timing on when he quit is right for. Hell The Rock's claim via his ex may even have been true! But when Gunn got appointed to head of the DCU just months later, well before that film went into production, obviously that changed and we got a totally different Superman movie. This is all quite a while ago now given Gunn's Superman movie came out! And shortly after that, Cavill fired The Rock's ex as his manager, perhaps unsurprisingly.)
Sorry just a random example that seemed very apposite to this point!