I dont know what happened with the ending, but this manga is too good to give a low rating.
Funny, although these jokes might only make sense to you if you're an otaku. By that I mean experience, understanding the culture, and tropes. Assuming you share that understanding, comedy can take place. There are some serious moments but really its selling point is the comedy.
TL;DR, you have to watch at least 300 animes and read 500 mangas and LNs before you can even begin to comprehend the genius of this manga.
Ehh, the art was good. Characters are basically tropes that play into the scenario for comedy,
but they are consistent with their tropes, so its OK.
The ending felt rushed and I just ended up skimming over it, but there is a sequel manga so its fine. I did reduce points for that but its just not that important compared to the rest of the manga itself.