[xPeru]

Quick response is you are too loose PF for your post-flop style. ie you are seeing too many showdowns and not winning them. You should be winning over 50% of showdowns, so it looks like you are either not giving up on hands soon enough and/or not playing the flop/turn agressively enough when you have a weak hand (1 or 2 pair).

You should tighten up PF until you build more post-flop skill. On the flop, bet out more when you hit it or are making c-bets. Fold if you hit resistance on the turn, and stop bluffing at the river so much. Check your win rate for suited connectors, I'd put money on them being a leak.

Quick thoughts, GL