You aren't doing quite as bad as I first thought, the Pokerstars
6 player games are 65/35 (better than Titan's 70/30) and you've won $435 from $442 outlay. Take out the $1 fee and you're slightly up.
Re your stats, as per previous posts quite hard to tell, but the fact that you've bust out more times in 3rd (13) than 4th 5th and 6th combined (9) implies that you're playing tight early. The 6 player games aren't suited for tight players really, i imagine a lot of the time you're sitting tight whilst opponents are taking each other on and knocking each other out, and are in final 3 hardly having played a hand in anger with 1,300 chips versus 2 opponents with 3,000 and more each. Sometimes this will be unavoidable and games will just get away from you, but i'd suggest maybe taking a few more risks early, getting a few more 5ths and 6ths, but hopefuily move some 2nds and 3rds to 1sts - once you're in position you can use your ability to outplay opponents. If you dont think this idea is for you, play the 9 players instead. Of course, could always be that you're just not very good!