Well, on the one hand, he's entitled to his opinions, and that's fair enough. There's nothing wrong with loving a game. As long as you're not telling other people they're not allowed to have a negative opinion (just as nobody can tell him he's not allowed a positive opinion), or telling people that your opinions are "facts" and that they're all wrong or stupid for disagreeing.
On the other hand, I struggle with this kind of thing, especially as a moderator. There was a user here (who was banned for some of the behaviour I've just mentioned) and every post of his would end with a variation of "it's the best ever, enjoy!" Stretching back through every PES game from the last five years or something - and you just think... Why are you bothering to post if your contribution adds nothing to the discussion?
I mean, sure, say what you like, but... The posts never changed, and he only appeared when someone said they didn't like the game, to assure them they were using the wrong settings, or playing the game wrong, or just couldn't appreciate greatness and didn't know what "real football" is because PES "has a soul". (Urrrrgggghhhh.) In-fact, I'm wondering if that's the same guy...
But I must confess, I get angry about those guys who are blind to criticism of the game - and I blame them entirely when certain issues aren't fixed, because if tons of us shout "Konami, this bit of the game is rubbish/broken" and just a few of these guys say "no it's not, there is literally nothing wrong with this game", then I guarantee nobody at Konami will ever look into it because they will point to those few guys and say "these guys are fine with it so it's not a problem".
(I'm talking about the "higher-ups" there by the way, not the guys who run the social media accounts etc. who see - and log - and report - everything. I'm talking about further down the chain.)