Dogs are not dominant over humans. Ever.

He sounds massively insecure to me, based on how you have described him. if you are attemtping to show him that he is not dominant, that is probably why you are getting bitten.

I would suggest first of all folllowing the NILIF 'programme' (Nothing In Life Is Free) if you search, you'll find it. Then take your dog to the vet to rule out any physical caue for his behaviour.

I would also suggest finding a good behaviourist who doesn't believe in pack theory and used positive reinforcement.

A dog that barks all the time and bites people is not a happy one.