Personally I like it... Abstract art isn't my favourite style, but It still looks good... For some reason my favourite part would have to be the background, dont ask why, I have no idea
But I would definitely not say your work is 'turning rubbish'... Everyone has some highs and lows with everything, including art I guess
Edit:
Oh, and its awesome your still posting art here, despite all the time that must be taken up with Uni work