Probably a generational difference. A lot of the gen-x youtubers talk like him - kind of downplayed, not that excited, he's letting the subject be the exciting part. He probably thinks he's just not that interesting as a person (I don't mean in a self-deprecating way, just in a way that is/was common in genx), and what's coming off as anger is him just not trying to be entertaining.
I'm guessing you're gen-z? or are used to youtubers like the King of Random - very excited, very expressive, nearly accidentally burning down his garage with frozen gasoline... people who maybe don't have as much expertise as a 20+year veteran, but who could make drying paint sound and look entertaining.
Not a fan of King of Random either. Some of his videos look like interesting subjects, but I just can't get past the presentation. Something about it seems like he's trying really hard to be entertaining or cute or something. I dunno, but I guess it works for many people, because it seems like he gets plenty of views.
I'm guessing you're gen-z? or are used to youtubers like the King of Random - very excited, very expressive, nearly accidentally burning down his garage with frozen gasoline... people who maybe don't have as much expertise as a 20+year veteran, but who could make drying paint sound and look entertaining.