Sounds like a bad mentor. You may need to cut your losses. It's possible your interpretation of your progress is not accurate compared to expectations, but that

Sounds like a bad mentor. You may need to cut your losses. It's possible your interpretation of your progress is not accurate compared to expectations, but that does not mean anyone should interact with you the way you are suggesting your dude did. Software development is hard and a good boss will understand that and help you grow, not belittle you.