Oh, he's a fan alright. He just doesn't believe in scripts and he runs his mouth off (and he doesn't allow other people to correct him). If a take doesn't get cut because he laughed or flubbed halfway, he uses it no matter how stupid the argument was. That's why some of his videos sound disjointed. I think the only ones he actually follows a script for are some of his longer Metal Mythos videos, and even then he might just use bulletpoints for those.
I'll agree with him that the game is too grindy for its own good, but this is a bit of a "giving players what they want" kind of thing. Everybody and their dog were clamoring for an open-ended campaign like MW4 Mercs. Well, Piranha released a campaign so open-ended its ass falls off whenever you hit a reputation wall. Me, I would much rather have a linear campaign in 4 acts like MW4 Vengeance, maybe with Mercs-style "choose when you do it" paths, and leave the replayability (the holy grail of game publishers these days) to a skirmish/multiplayer mode reusing the maps from the campaign with randomized enemy spawns.
Fluff-wise, he's not wrong that BattleMechs were extremely valuable by 3015. But his point is so off-base it might as well be vacating in Tijuana. My problem with MW5 in that sense is the sheer amount of LosTech you get access to just wandering around as a merc.