Why the hate on healers?

It’s not just blizzard there’s a general disdain for healers in this game. Nothing can ever be easy for them or the game will end. Blizzard nukes their damage and cuts everyone’s health bars while also gutting their healing going into war within. It’s only now that I feel we are getting our stronger heals back but the health bars are still too small which means burst healing/absorbs is still too good and our damage is still very low