I have had many pets and currently also live with two feisty forpus parrots. The female sometimes bites me (as every forpus owner will recognize) and i know very well why she does it; i am touching her aviary to clean, or to provide food or toys. It's not that she hates me, but she is incredibly territorial. And i fully respect that, because i understand her. It's not personal at all. She is learning though, nowadays she hardly ever bites anymore and she is starting to inhibit the impulse, for instance if she notices i didn't want to touch her stuff but merely wanted to offer her a treat.

(But if a pet would tell me they hate me, i would want to know why and fully respect it)

Btw, i think chances are bigger that a pet would tell us: i'm so bored for a big part of the day, because i can't read or scroll on a phone, rather then tell us they hate us...

Edited to add: parrots are not really domesticated yet. It's only been a couple of generations since they live in our homes, compared to for instance our dogs.