POE 2 Armor/Hp/Resist Problems

Hello, i have 'Smith of Kitava Leap Slam Build'.
I'm currently level 93.
Well, i'm doing expeditions and get one shot by white monsters...
How is that possible, it's very hard to gain that 10% exp back.

i have 3.3k Hp.
cold, light and fire resist is 90.
chaos resist is 75.

still get one shot by white monsters in expeditions, how the fuck is that possible?

i'm griding maps pretty easy tho, but there is no drops.
wtf is going on with that fucking game?