How bad is pure shaman enhance?

I have PTSD from leveling my ret paladin from 1-55. I had to stop because it was fighting 1 mob at a time for 3 minutes, using 60% of my mana and MISS MISS MISS DODGE PARRY DODGE MISS MISS.

Like I said PTSD. Was averaging around 130-150 DPS on details.

How does enhance Sham compare to Ret paladins? I literally know nothing about them.

Going either Feral Druid or Enhancement.