Why do you say that? The content seems fine and generally applicable to a variety of games, even though mobile gaming was his focus. And yeah, he's not as successful as others in the area, but that doesn't mean the information is bad.

He's teaching people how to profit off of getting people (including kids) into virtual gambling, microtransactions and other addictive behaviour, and exploiting "whales" (who are actual human beings).

Historically, there was a way for people to make successful, interesting, exciting and fun games that didn't require horrific financial exploitation of vulnerable players.

To quote the Dude: "You're not wrong, Walter, you're just an asshole."