Where did all this envy come from? Dude has extra money to spend waste on games. Don't be pissed off about it. Why should he spend his time or money "making the world a better place" if he doesn't want to? It's the "you didn't build that" mentality, and it's disappointing to see it here. It's his cash he's wasting, not yours.
Would I spend that on a few dozen games myself? Hell no.
Do I think profit-driven collectors that don't care anything about the games skew the market for us true gamer that also collect? Sure.
As for Metal Jesus, I enjoy him and his crew. His vids are fun and I've been opened up to new games I might not otherwise have seen. It's his viewers that rush out to buy the games and spike the price, not him. He's just doing his channel and talking about pickups or hidden gems or games he likes. What's wrong with that?