It's not apples to apples. It's mostly just a reference point to other longwinded, seemingly endless arc where nothing much really happens. Using DBZ as that reference is because that is easily understood by most people.
I also take umbridge with the idea that this manga being monthly somehow means that the pacing is somehow better. I assure you it is not, especially when you consider that the chapters of this manga are not as long as other monthly releases. Since chapter 72, the chapters of this manga average at around 20 pages, not including credits pages or omake chapters. 20 pages per month is slow enough as it is, but when they author has now spent the last 3 months (60 pages give or take) on the same thing it comes into even sharper relief. I cannot even think of the last time that I've read anything that spend 60 pages on a single scene, which is what this is. Even if we were to compare it to the aforementioned Namek DBZ nightmare, at least things generally HAPPENED in those episodes, they were not static single scenes that dragged the entire length of the episode.
But wait there's more. Since Gojou and Marin have finally (mercifully) arrived at comiket, which happened in chapter 96 (so 80 pages if you're not keeping score), a full 22 pages have been random photographers monologuing. Random, nameless characters who have no bearing on the plot, who are contributing nothing to the story, who will never have any meaningful impact, and who will all disappear eventually (and eventually cannot be stressed enough) have eaten up a total of ONE FOURTH of all the meager pages we get. And for what? So that everyone can jerk off over a fictional manga? A manga that does not exist and is therefor impossible for us, the readers, to have any sort of attachment to or reverence towards. It's psychotic. And yet even more pages are just full page spreads of Marin standing there looking straight ahead. I didn't even bother to count those, but it easily makes up another significant chunk of what little we have received.
In short, these last 27 chapters have been utterly miserable, and the last 3 in particular have been a perfect shitstorm hurricane of the sort of self indulgence that can tank the reputation of a manga/novel/graphic novel/any other storytelling medium. Even Oda would be ashamed of this pacing.
EDIT: The only reason that the average page count is even as high as it is is because there is an outlier chapter that has 50 pages. That chapter is about the FICTIONAL manga that Haniel is from, which, as I mentioned earlier, is a big fat nothingburger.
