Finishing 4th

[Oddchild]

Hi guys. I'm sure there have been countless posts before, but Im after some new views. Can anyone help.
I play quite a lot of PP NL single table tourneys, normally for between $10+1 and $30+3. My problem is (and it has happened WAAAAY to much to be a coincidence) is that more often than not, I finish 4th - out of the money.

Ive done it 5 times in a row before!! Ive tried being tight. Agressive. You name it! It doesnt matter if I go into the last 4 as chip leader - I still find a way to lose.

Can anyone help? It's really affecting my spirits!