New Simulacrum is bad

So, not been running a meta build. Managed every other tree to max, no issues.

Spend the last couple days farming fragments. CI but using some decent Stun Threshold roll on boots with Ascetism and over 6k ES/Mana.

Get to W13 and get wrecked.

Stuff doesn't take CC, affixes for the wave didn't have CC resistance. 150% Freeze Buildup in passives/jewels/gear. Just get swarmed and CC just seems to be ineffective or take several seconds before they even show build up or take damage?

Pretty terrible experience. Combined with the days in terms of time lost across the last week to random death the punishment feels pretty real right now.

I'll continue to grind on because that's how this game works but it feels bad. Kinda out of left field.

l 95 monk CI with 5.5 base ES and with grim i am going 11.something i have 0 problem clearing any content in the game right now with my build everything goes 1shot expect simulacrum lvl 11 and up . My best at 5 tries up until now its lvl 13.I am running 50% ES as addition stun threshold with my jewels because the stuns are insane inside and my base dps its around 109k ( also playing crit version with 50% crit chance and 500% crit dps bonus ) AND SIMULACRUM DESTROIES ME . Why? does it has to do with the fack i am playing CI and has 0 evasion maybe i should try my other build with evasion but the problem ther is that i have only 2.3k hp and 1.3 ES and propably i will get 1shot .PLEASE HELP any suggestions would be great