You aren’t missing much by not watching the videos. The guy mostly just says “this sucks” a lot. He is also hilariously bad at playing it. Not just bad in terms of not understanding tactics, but he will do things like say “I don’t understand how this works,” while he literally at the same time has the tooltip open, but he doesn’t read it. He also didn’t know how to level up characters despite the game pausing itself to give you a tutorial on leveling when you hit level 2. And he calls people who like the game “casuals.”
It’s best to ignore this guy. If you look back in his posting history you can see that he has been saying this game sucks since well before it released. He thrives off of conflict and animosity, so while his opinions on the game are probably genuine, he is still very much a troll.