Need Help with my Deadeye Build

Hey, i try for some time now playing Deadeye, and i followed some guide. but my problem is that i can't figure out why i die at any given boss fight. After the update today i didn't even finished one map every time dying at the map boss

would rly appreciate help to start handling the bosses

My PoE2 Ninja: https://poe.ninja/poe2/profile/Pinkii-7560/character/TaikiikunDeadeyeRotA

if more information is needed i deliver them asap