The game boils down to a single-shot mechanic.

PoE2 came with the idea that it would be different from PoE1, but it is identical, builds break from one shot, that's the summary of this game, shitty and lazy mechanics.
We have a few viable builds and they are all one-shot builds. Map mechanics that kill you and we don't even know how we die. The pinnacle bosses are the worst part of the game, I killed them all with one shot using Gemling attribute stacker, it was the most boring thing in a game i've ever had. The other builds I used, i even killed some bosses, but the damage was lower and as the fight took a long time, which was fun, until the boss filled the screen with one-shot abilities. It's almost impossible to reach the T4 boss with builds that are not one shot.
I don't play anymore, if one day they change that I'll play again. GGG promised a different game, but we have the same shit that exists in PoE1.