Why does staying at home cause mental distress?

Using the thought process of Han Bingzhe: You don't have to go to work or school, and you're not forced to do anything. Conversely, you can do anything according to your own ideas.
There are two issues here: First, no one is forcing you to do anything, so you can't shirk responsibility; whatever you do is necessarily your own choice. Second, the things you can truly accomplish are inevitably limited compared to the everything you're allowed to do.
Compared to the freedom you're permitted, you're doing too little, it's too dull, too—compared to all visible possibilities—poverty. And because of the first point, you are free, meaning your lack of action is caused by yourself.
The gap between broad freedom and limited actions is entirely borne by the individual, which is actually a heavy burden.
The trouble with neo-liberalism is: it used to constantly restrict what you can't do; now, on the contrary, it constantly promotes that you can do this or that, but in reality, you can't, and all of this depends on you.
Consumption, leisure, and entertainment are all under pressure. The implicit message is: you can, you should, and you should do something creative, spectacular, and gain more—actually endless more—so you'll always feel it's not enough.
The deficiency here isn't about failing grades, insufficient income, or lack of success—these moralizing messages are easy to counter. But if the echo in your mind is "You can feel even better," then the trouble is much greater.