In our progression meetings I saw he was doing nothing, still he didn't had "any doubts to ask".
There seem to be a few different cultures within tech workers; some tech workers are very comfortable asking questions and being humble and knowing that they don't know. Other tech workers have a sort of bravado or a deep fear of being found out that they know nothing, something like imposter syndrome.
He started saying "that the techs we were using in our project sucked, that the techs he knew worked better". He tried to do some tasks with those "better techs of him" and failed, but still kept on using what he wanted.
There seem to be a few different cultures within tech workers; some tech workers are very comfortable asking questions and being humble and knowing that they don't know. Other tech workers have a sort of bravado or a deep fear of being found out that they know nothing, something like imposter syndrome.
Usually that doesn't work out so well, not even if you're a great programmer who rewrites an entire system in Smalltalk.