[watwut]

It would really help if you gave us what feedback and questions on skills you exactly get and language you use. Anyway, stop focusing on speed. Focus on learning. Instead, take notes of what they complain about and systematically learn more about thing they say was wrong.

1.) It may be that you learn different standard of coding practices, they vary a lot between companies. Each company have groupthink of "this is definitely necessary" other companies never heard of or have completely opposite groupthink.

2.) It may be that you miss some fundamental skills, but it is hard to guess which it could be and point you to right direction without knowing more.

3.) Another orthogonal option: you might run into alpha coders making themselfs feel good and look great by overly criticising others. I am adding this as possibility, because that absolutely exists.

To distinguish 3, start taking notes of what feedback you get. First, if they are contradictory, then you know it is situation you are in. Second, that will allow you to not make similar mistake again, learn local culture and habits.