Thanks for all your opinions on this. Thankfully i recorded the fight and was able to analyse what went wrong.

First of all, to clarify some things: It was Haukke manor, Boss Manor Claviger. It was not a single mechanic that killed me... the healer went afk before the fight and i didnt notice, so i started the fight. On top of that i got hit by his big aoe which i thought i had interrupted, but that wasnt the case. 2 things i learned in that fight:

1) Wait for afk players
2) Move out of big aoe attacks

I know my death was absolutely my fault, that was not the point of ths thread. Its just about that other player telling me to read guides... i dont want to read guides, especially for story content. However I will read them for harder endgame content though, just to not be a burden for others.