With 42% ITM and a negative ROI, you must be getting too many thirds. This could indicate poor ITM/bubble play. Specifically, not pushing enough and limping in crippled to the money. Although your ITM might go down slightly, if you play more aggressively in the later levels, you will have a better chance of accumulating a big stack and beating everyone over the head with it all the way to first place. All this being said, play about 150 more SnGs and post stats again. Also, post bubble hands (4 people left). I'm sure you're not pushing enough.