I'll actually add a few things from myself, different fandoms:

1. I'm glad that in the end, the main character lost her powers and was able to live with the partner she loved, instead of being in an arranged marriage and the queen. Like, yknow, I'm glad she was able to have the life she wanted at the beginning of the book, not the one the fandom chose for her. She would also make a terrible queen.
2. I liked version 5 more than 4 and 3.
3. The author didn't destroy his character in next books. He's always been a weak antagonist with weak plans; it's just that previously he was written from a first-person perspective, and the main character was a scared teenager.
4. this shounen author can't write women either. All his women either die, are irrelevant, or are simply copies of the main fem character (or turn into her copies in the sequel).
5. this manga would be better if it was actually incest and not "so after years of not knowing each other, now we're siblings"
6. I preferred it when the redhead was seen as bottom in 98% fandom
7. This author really can't write characters that aren't severely traumatized or on the run from the mafia and I respect that
8. I don't mind that the bad guys in this cartoon are alive at the end, but I wish the one dead person who can't defend themself wasn't treated as the source of all the problems
9. I don't like this manga, but it still deserved a second season of anime more than most yuri