It isn't mean spirited at all. It's observations based on his videos the past 1-2 years. He also has pretty blah production quality with rough edits, often terrible lighting, lots of rambling, more oft than not questionable (at best) safety practices, when he's doing chemistry he never has proper safety equipment etc. Unlike NileRed that has fantastic lighting, proper ventilation, obviously at least partially scripts what he's going to say, doesn't get sidetracked with unrelated rants...

Cody literally had federal agents come to his house and search it after some of his highly questionable videos involving radioactive materials, commercial explosives and homemade (highly unstable) explosives.

He literally power-walked through a busy airport recording himself talking about blowing himself up in one video (referencing his 'prank' video where he 'blew himself up', not that all the people he was rushing past were likely to know that).

He literally used liquid mercury as mouthwash in a recent video.

He literally showed his shelf of canned food with his row of home made poisons and toxic substances.

He's had several videos lately where he's showing textbook signs of clinical depression after his breakup and has ramped up his eccentric behavior even more since, like wearing chainmail in public and ranting about the government and YouTube being against him.

While I agree your original post was maybe harsh, but not "mean-spirited", it drives me crazy when people use truth or objectivity as a catch-all justification for behavior or attitude. He wasn't accusing you of lying - e.g. "you're a fatass" would, in most contexts even where it is true, also be mean-spirited. Things can be both, and frequently are.