Reading the comment section make me realize that, people only care about the "fluff" stuff.
Or, many care about something actually happening so that the story move forwards. Last chapter was 95% of nothingness regardin Marin not knowing how to break a photo circle, while 5% was actually about moving the plot forward (the awkwardness between Marin and Gojo on their way home.
This chapter same, 95% of the chapter are about 2 dudes gushing over how good the cosplay is (which has been abundantly conveyed for the past 5-6 months now), whereas only 5% of the chapter moves the plot forward (the Mangaka himself actually approving something that was derived from his work), and seeing Gojo still depressed at home.
I re-read the manga, and also rewatched the anime this past 1-2 weeks, and the pacing has slowed down conciderably, which I think other have picked up on as well. Reason people criticize is because they really like this manga, and wants to see the story to unfold, but for the past few months, it has been at a standatill for the most part.
When a chapter is 30-40 pages long, one would expect at least half of them being focused regarding moving the story and progression forward, not 5 pages only.
I personally dislike this slow pacing, but I still love this manga as a whole. I just hope that the pacing in the story picks up a bit and things start to move forwards.