Across 180+ chapters we've seen her personality change, and here we are in "oblivious ditz" phase. This would have panned out differently had it taken place about a hundred chapters prior.
@Le_Dook criticism is part of discussion. Your own post had everything to do with being angry at the community and nothing to do with the chapter, so should it be disallowed, per your logic?
The chapters are few and far between because Souryuu works on three serialized series' at the same time. This one gets one quarter of a chapter per week for a month, and he sometimes takes a break between months.
This chapter is meant to be the end cap for volume 3 of the paperback books (which...