So from the things that he said are wrong, can you take ownership of any of them?
Can you DB those things? You need to set up goals. Small obtainable goals and work towards them. Baby steps towards your ultimate goal.
This is time to look in the mirror and see what he sees. What can you change(180)? Do those things for you. Not for him. You make yourself a better person and he will notice. But you do it for you because db'ing is not a trick. It is hard work.