It's common. I have a friend you described perfectly...for a while.

He did outgrow the eat the rich mentality I suppose. Now, he thinks demons and gods are all that's real anymore (via a web of theories) and they're driving every detail of his and everyones existence. _That's why you should be as angry as I am_

"Romantic poverty of victimhood" pushed to maximum nihilistic conclusions. He leaves himself no room for growth in his personal life or soul. It's kind of hard to watch.