Resistances need a rework

Resistances feel absolutely useless. 75% on every resistance and i am getting insta killed by enemies that are lvl 78 when i am lvl 83? I am truly under the impression that monsters just deal hidden true damage and that resistances are not actually 75%. I feel no difference from having 50% to 75% and that is not by any means a good thing. I have no problem killing monsters in any map tier but for some reason i will just take 1k damage from a single white mob at random? GGG Needs to set their focus on player damage taken.

I feel almost no drive to want to continue playing this game if the endgame is literally just one shot or be one shot. That is the most piss poor game design for "difficulty"

Side not i also have 76% max for fire but again that 1% probably stops 2 damage. Either resistances are poorly made in the coding or they are just flat out bugged.

Lvl 83 warrior warbringer with the passive that makes my totems take 20% of my damage in their health for me BTW. Just under 3k max health, 76% fire, 75% cold, 75% lighting, 75% chaos and 65% armor.

What is the point of playing endgame if it feels both pointless and inaccessible?

2nd side note - Monster move speed needs to be lowered, there is no reason for monsters to be zipping around the map like the flash and stun locking you at random intervals.