rating 700
I looked quickly at your last 3 losses... In one you played the Fried Liver with black, a notoriously difficult system to play but your opponent didn't play the main line. In another you pushed pawns in front of your king and hung a bishop to a knight which also forked your queen and rook. In the last 2 of your minor pieces were forked by a pawn. So you hung some pieces... Things to work on - a little opening knowledge (don't go nuts, just try to get the ideas in the openings you want to play), a bit of strategy (it's almost always a bad idea to push pawns in front of your own king), and of course stop hanging pieces. Do a bit of tactics puzzles. And if you want to improve play longer games. Give yourself time to think carefully.