Citadel failed, one portal and other restictions

So i have done 3 citadels so far, and on the third one i died.
Firstly, why Doryani stays alive in the first phase after i kill him and keeps shooting stuff at you? I got confused and of course he one shotted me with 7.5k hp pull, of course one shot, so fun and interactive.
And secondly i was surprised to learn that not only you have one portal but only one try with citadel. Dont you think its too much? I lose map exp and all the time i spent getting to it because? Why? One shot nice? Git good? Why everything has to be so limitted in this game for no reason, its not matter of choice its just bad design.

-One portal per map
-one try per citadel WITH one portal
-no ascention reroll for no reason despite having it in poe 1. Especially considering that in early access builds constantly getting nerfed, so i cant eeven make a switch due to my set up being just killed.
-one gem of a kind per build

I feel like the game is constantly trying to punish me as hard as it can for my choices and my mistakes.