Redline (and other) help needed

I know I'm not much good at poker and am seeking to improve. The first part of my graph was doing quite well till I had a very tilty session. I know what caused it (beer, bankroll management, etc) and that is now behind me. I tried to implement stuff I learned here (like not calling too much, don't stack off with 1 pair etc) but if anything things got worse. The red line seems to be the worst offender but there must be other things I'm doing wrong. Am I playing too many mid posn hands? Not stealing enough? Too many blinds? I'm pretty sure my biggest problems are post flop. Would anyone care to comment on my stats to give me ideas on what I should try to change. Thanks.