For playing SH, imo the red line should not be so low. It is hard to get it in the positive on the micro limits, because people don't fold much, but it should be much closer to break even. C-bet more when agains one or max 2 opponents on the flop, if there are more than two it is usually beter to just check if you don't hit.
Steal the blinds more. 25% for SH is to low. I usually steal close to 80% on the button when the pot is unopened. It may not seem much to risk only for 1,5bb but you will so often win preflop or on the flop with a c-bet, that it is worth it and it adds up over time.
That's just quick look at the stats, someone more experienced will be able to tell you more.
