"It That Hates" mob is perfectly balanced

Seriously, what is that mob supposed to be? Why does it do so absurdly much damage compared to everything else? Why does it do it so fast over long range with projectiles that are barely visible?

This patch I play melee and no ES, and I randomly died multiple times in breach and couldn't figure out why, because I don't take damage and then poof, my HP goes down super fast out of nowhere. Then finally saw this thing shooting something just now, practically invisble if anything else is on screen.

This is honestly just stupid. I guess it does chaos damage? What am I supposed to do against that as a non-ES, armor based char progressing in low maps? I can't see it coming, I can't skill more HP in tree and armor is useless against chaos. Reaching 75% chaos res is out of the question at the stage I'm at, and the armour on chaos abyss mod on helmet isn't something I can have right now either.

Well, even with 55% chaos res now it still kills me instantly in a lvl 77 area already. Not even T15/16.

This mob is just a prime example of what's wrong with HP, Armour and the left side of the tree. I have 2.3k HP and armour, so I die instantly. Meanwhile every shitty ES or ES/Eva build would have way more ES at this point. That chaos damage does more damage against ES also just doesn't matter if ES pools are easily more than double of what you get with HP, or are on top of HP for hybrid builds.