Blind play is killing you.
Looks like you 3bet a fair amount in the blinds, I'm willing to bet these are the hands that are costing you money. Run some filters for SB and BB and see what your WR is when you:
1. Call a MP/LP raise in the SB/BB
2. 3bet a MP/LP raise in the SB/BB
3. When you raise in SB/BB vs limpers (also look at how you are doing when called and see a flop)
4. How are you doing WR wise when squeezing from the blinds?
Srsly, fold more in the blinds (it will help your non-SD winnings a lot). You don't need to play back when they steal everytime.
Table select if you ain't doing it already.
And you might want to check out what pokerbiker said too