Being an oldschool MMORPG player, I don't find the game that difficult.
For someone completely new to the genre, it can be overwhelming when the hand holding on to you lets go at endgame. The game doesn't ever tell you how to play your class, what the accuracy cap for a boss is, etc. You have to find that out for yourself. You could be playing your class inefficiently and be completely oblivious to it, and knowing how to efficiently play your class is the first step you should take if you're doing endgame.