I think I'm done with this game.

I've been slamming my head against Elias in the capstone dungeon for an hour now and I can't handle it anymore. I'm a level 69 (nice) penetrating shot rogue with pretty good gear. But any mistake I make is a one-shot. Every time I get a good rhythm going, I hit a new phase to learn. I spent 2 weeks in tier 3 building up for this and it's all been pointless.