i think it's funny that some thought you meant you were playing on tilt insted of FT, lol. tourneys are tough at times. all the advice i read generally recommends tight play in the begining and loosen up midway to end. but than everyone seems to be doing it lately. i'm not an expert but i have been itm in tournies. the best advice i can give is stay focused, notes on opps, remain calm, take advantage of your position, don't overplay a monster unless you can put your opp on a hand or your 99% you have the nuts, semi
bluff if it won't put you out of the game (you have the chips to back you).
you mentioned bowing out when you had a winning hand - don't do that. don't get bullied off you hand, if you let it persist, it will make you sick- i've been there.
your mindset sounds a little off because of your disappointment in not being able to itm. if your consistent and patient eventually you'll make it i'm sure. maybe your playing to tight in the begining to allow you to aquire chips to see cheap flops.
well this is my 2 cents worth, hope there is something you can use. if not i'm sure you can use this - GOOD LUCK