So go watch and promote SoulSoBreezy and Hazel, both very positive YouTubers who are only critical of WoW in the gentlest of fashions. And ignore the YouTubers and streamers that annoy you. That's how you be a consumer of entertainment, you pick and choose what appeals to you, as does everyone else.
Exactly, it's all entertainment. I'm not saying they don't believe what they say, but their goal is to entertain an audience of people who agree with what they say. If many people didn't agree with Asmongold and Bellular and whoever else then their channels would fade into nothingness because no one would be listening.
The OP's problem is not really with YouTubers and streamers, it's with the fact that so many of the most invested people right now don't really like the game that the OP loves and that, apparently, bothers the OP. And, again, if you don't like criticism then don't expose yourself to it. Play like an ostrich, if you can't see it then it's not there. Just go play and have fun.