If you want, see if you can set up a small meeting with your manager and tell him about it. If you already have, then I'd say there's two possible cases 1. He was just very busy 2. He's an asshole. I know how tough it is, but talking shit about yourself isn't going to make things better, I don't have a magical cure, hell even I think the same things sometimes. But I've found that limiting the circle of self-loathing had a massive impact on my anxiety and therefore my ability to speak more coherently. Most importantly, never keep quiet, if they don't have the patience to listen, then they aren't even worth your thoughts. I believe in you bro, you can do it.