I actually think the Manga looks pretty good, I dont know what people are on about.
Maybe their expectations are too high?
On a separate note, I think you should drop the overuse of honorifics, or change the names to actually match those honorifics.
For example, hearing "Serraionga-chan" is quite awkward and jarring, it just doesnt work.
Maybe a nickname like "Serri-chan"? Personally think it works a lot better (obviously you choose the names, I'm not the greatest at this stuff either, evidently).
Maybe their expectations are too high?
On a separate note, I think you should drop the overuse of honorifics, or change the names to actually match those honorifics.
For example, hearing "Serraionga-chan" is quite awkward and jarring, it just doesnt work.
Maybe a nickname like "Serri-chan"? Personally think it works a lot better (obviously you choose the names, I'm not the greatest at this stuff either, evidently).