The show masterfully deconstructs the "genius hikikomori" trope. Satou isn't a misunderstood artist; he’s a guy who masturbates to loli porn, tries to scam his own mother for money, and joins a multi-level marketing scheme because he’s too proud to work a normal job. He is pathetic. And that is why he is brilliant.
Welcome to the NHK refuses to give you a cure. It offers you a crutch. It tells you that life doesn't get magically better. You will still have panic attacks. You might relapse. The anime figures on your shelf won't love you back. -Oyasumi- NHK ni Youkoso - Welcome to the NHK -