Look at a lot of musicians/comedians/writers or anyone with a public presence. Chances are they put on a nice mask when interacting with people but once the show is over its a very different story. The mask comes off.
Some people can be extremely good at putting on a mask, and when you look at what DSP does for a living which is playing video games, video games was probably his escapism at one stage. Once you tune into a video game (after you've finished your hour long prestream) you don't need to think about your bills or your weight or anything except for 3d titties.
Other great forms of escapism include watching tv for hours on end, spending money carelessly and substance abuse.
That's a big reason why I don't really subscribe to the "oh he's obviously bullshitting" theories, because a lot of people have said a lot of things about "muh depression" which aren't entirely accurate and not only that are basing it off some guys internet persona.
Perhaps something interesting for people to consider is that accountants who are known to be business suit wearing smart people who charge lots of money?
They drink a lot and take a lot of drugs:
https://www.tsbpa.texas.gov/pdffiles/cpahelp.pdf