Which is what it takes, he has improved and he has to understand that he cannot perform on site in conjunction with others. As well, he has expressed in the comment why he is unable to work with others.
This is what it will take for him to improve. And let him understand what he does not get confused with others. As well as the expression of his opinion about why they can not work with others.
It takes him to improve. And let him understand what he can't do work with others. As well as giving him expressed the opinion that why he can't work with others.