Why are Criterion dungeons so hard?

[fumofu]

Must say I totally agree with OP. Criterion ex was a complete disappointment. I expected it to be on a similar difficulty of a final deep dungeon floors, but got just another savage duty instead. Why is that? There were supposed to be 3 difficutlies, right? Normal, hard and savage, no? Instead we got normal, savage, savage+! So.... after clearing all paths on normal, which took me 4 evenings, I'm out of content again? I seriously feel this game is getting a bit too hard for my taste, with so much focus on difficult content, which I don't like...
I'm not a casual player, I just prefer playing on easy/normal difficulty.