If farming phoenix was frustrating, this new raid is even more so. You're happy to just not get a fail.
One of the most frustrating things about it is to be 5/6 not getting your final piece for the set bonus and that half your gear wasn't even your main stat.
I don't know after awhile just farming the same boss over and over again didn't seem fun to me. What I found fun was arena and guild battles but even then most of the time I was absolutely overwhelmed by their Ult allies or a rogue who can 1v4.
The game overall just slowly lost interest. I think one of the best feelings I got in the game was the PVE aspect from just completing harder difficulties. Myth gram one of the hugest cockblocks in the game, I felt a sense of achievement doing it. It's similar to killing diablo the first time on inferno.