It's probably just the shock of experiencing increased difficulty in nightmare and hell combined with lowered drop rates. The endgame geared characters will undoubtedly be stronk but the road to get there looks daunting especially for a solo player. My vengeance pally has good damage but is so squishy it's just not practical to try and farm with vengeance. I need to respec into blessed hammer just to see if I can then contribute in a cow run whilest standing behind a wall of necro summons
I'm sure we will figure it out.