Y'know I think Hitler is probably the prime example of what I'd tenuously call "Middle Class Psychosis."
Basically, there's the appearance of a tendency among some children of the middle class, especially more introverted ones, to I think recognize the alienating nature of modern labor and try to reject it via pursuing a career in some kind of artistic or otherwise "unalienated" field, basically wanting to get paid to be themselves. They may even have some natural talent in it! But when that talent runs up against the realities of the market, it breaks their fucking mind.
Hitler's paintings really don't look all that bad. Hell, if anything they're better than whatever I could make. For a "village kid" I imagine he was actually fairly talented and given what we know about his relationship to his mother, she might've encouraged him in his efforts or praised his art. He could've set off for Vienna thinking he actually had a real talent for art even if he was (mostly?) self-taught. Then he applies for an elite art school, and surprise-surprise, he finds out he isn't anything more than a kid from the stix out of his depth. He couldn't merely will himself into becoming some beloved "artiste" and while he likely always had a clerical job available to him through his father's connections, the failure of pursuing his dream coupled with a natural desire to avoid alienating bureaucratic work likely dissuaded him from even considering getting a "normal" job.
And you know what? To some extent I can almost sympathize. I struggled and suffered for a degree I'm not even using right now. I've been told time and again I've got a talent for writing but I don't have the drive to see it through and actually write anything I could make a career out of. Even if my writing is actually decent it'd still have to stand up next to other equally (if not MORE) talented writers. It's terrifying, really.