It's totally fine to hand your supervisor 'crap' work. It is their job to look at what you are doing and advise you if you are going off track. Also, you might think something is 'crap', but your supervisor might think it's good ... let them be the judge!!!
I know how you are feeling (I always dreaded giving my supervisor draft chapters), but honestly, just keep churning out stuff and giving it to them for feedback.