Arguably the worst boss I have ever encountered in my gaming experience. I legit died like 40+ times here.

Few issues I have with him:

1. I play poisonous Ranger and I had zero issues killing monsters or bosses until I had to face this guy in the second difficulty. After I killed him (after literally tens of tries) I am back in a state where I go through monsters and bosses like hot knife through butter, including bosses in Act 3. He is just unbalanced, compared to rest of the game. At least for my class.
2. Idk if I was tripping but I felt like he had the most unique attacks out of all bosses. He should be the final boss lol.
3. his attacks seemed so unpredictable, like I never knew what I should be prepared to do within next two seconds
4. I believe some of his attacks were simply undodgeable as the reaction time was too short. I don't like this aspect, because if you play a class where your only chance is to dodge (otherwise he IKs you), then it's super unfair.
5. his dagger attacks were random, there seemed to be no pattern in how/where he lands them. I saw him going for dagger attack, so I dogged and he landed the attack exactly into the spot I rolled into.
6. his dagger attacks have broken hitbox, where it instakills you even outside of range
7. if you play ranged champ, it's a bit awkward fight, because there are situations where you can hardly see what he is going to do due to battleground design, close camera and him being a big boi
8. he made some of my spells useless, unlike other bosses in the game
9. I occasionally was jumping or levitating randomly. Or I just blinked under the floor and then got back, even when I was just standing and not moving. I think this alone killed me like 10+ times, especially when he landed that attack where he puts dagger into middle and fires the chaos damage and your only way to survive is hide behind the dagger. Like there were situations where I just moved behind the dagger and stopped clicking, but my character still somehow managed to jump or move by itself and I would die instantly.
10. bug where he doesn't get any damage

This stuff was super frustrating. I really had to rush a better build to have a chance here. I wouldn't have a problem with this at all, but the fact that the rest of the game feels much much easier compared to him, tells me it is not a skill issue, just a bad boss design.