The last chapter is too short and the way we got here was too disjointed. As is, if Part 2 only consisted of chapters 231 and 232 literally nothing changes. In order for this ending to work you'd need yo show off more of the new world (something like all 4 horsemen working for the government, Aki and Himeno raising Nayuta, Kobeni writing a popular tell all about her abusive home life, etc) It doesn't all have to be happy, but we absolutely needed more "where are they now" moments than we got.
Secondly, they needed Denji and Asa to at least be friends. Part 2 is entirely about their relationship, so just having them stare at each other isn't enough. Granted, having Denji save her social life by catching her when she falls is a nice touch, and having her be able to call out whatever remnant of pochita exists in Denji is sweet (and good sequel bait) but a few pages just isnt enough. This needed to be two chapters at least, one for Denji and one for Asa.
Firepunch had a ridiculous, abrupt, out there ending as well, but even compared to that this just sucks...