Need help with boneshatter

My build: https://pobb.in/EXypTSO8L28w

i've senn a lot of boneshatter doing crazy ammount of damage, i already tried the 2h axe version and my dps don't get even close from the builds i've seen.

They can get 24m, 100m, even 1b of dps an i cant get even close of that.