I've only seen his initial blurb which was basically an 'its not for me post'.

I understand the pushback on a few things. "Weeb Aesthetic" is just some utter nonsense people say when they are trying to rile up people, or when they have no clue what a "Weeb Aesthetic" truly looks like.
I can see where someone is coming at with 'clunky' if they came from WoW. I dont agree, but I can at least understand this. Slow, I don't see when compared to a game like WoW. Sure, its slow at level 30 but not by level 60.
And lack of RPG elements coming from a guy playing WoW is pretty ridiculous, although he did seem to clarify that he thinks RPG elements = character customization.

So his criticism does seem to be 'this game is not for me', which is fine and people should accept that. However it does come across as someone who is ignorant of the RPG genre in general. It is a very poorly written reason for why he disliked the game, but to be fair it could be because of trying to fit it into few characters.