You really shouldn't be worried about quality to much just do the best you can and get what help you can (friends to read it, on campus, tutors, your supervisor etc) if you are stressing out a lot over it I found it surprisingly relieving to read absolutely garbage published articles ( I mean with key bits of their arguments not even cited bad). My University also made a point of having us read one MA dissertation where the guy handed in the dissertation without a conclusion and notes in the margins for things he meant to fix and he still passed (barely). So again just write the best you can and make sure it is complete and on topic and you should be fine.
_________________
"I'm just like you, Made by He, Despised by They, I'm almost me, I'm nearly human, Look at me im almost a human being."-voltaire