just to be clear im not saying the manga is bad by any meas or that i have a problem with it, i just find weird and kind of lazy that the 3 year of high school pass in 40 chapters compared to stuff like yuru yuri that´s 100+ chapter and the girls are still in the same year (maybe im wrong it´s been a while since i read yuru yuri feel fre to correct)
In what world is 40 chapters lazy?
K-on did three years in 4 volumes with a total of 56 chapters, then it moved on to college.
A Room For Two has done three years in 4 volumes with a total of 40 chapters + 5 bonus chapters.
These two series are very similar, and it would be difficult to find someone who thinks K-on was "lazy" because there weren't 100+ chapters.
If we could decide if something is lazy or poorly made by looking at its size, I would actually insist that Yuru Yuri's author isn't trying very hard if that many chapters have passed without any significant changes. But that's not how things work. The quantity of a work isn't proportional to its quality. It can only have a subjective impact on someone's opinion.
Family Circus debuted in 1960, and is still going and nobody in it has changed. That comic is probably older than 99% of the people on this site. Is that a good thing? Bad?
Look at Garfield. Is Garfield still funny to this day? I don't think it is, but certainly there are other people who look forward to the sunday paper every week because of it.
Now look at Calvin and Hobbes. It had a good long run and now it's done. Would it be better if it had continued? (...Bill Watterson's wishes not withstanding that is...) Well... that isn't for me to say, right? I think that it ended perfectly. My brother even has a framed print of its final page that I am extremely jealous of. But there are people who want it to return in some way. There's even some really impressive fan comics out there, like one about an adult Calvin and Suzy's daughter, and they're pretty darn good.
...boy oh boy, this sure is a lot of text. Maybe I should stop here. Sorry 'bout that.
(btw I have absolutely no hate for Namori, she's an incredibly skilled mangaka and I have a lot of admiration and respect for her. I actually really like a lot of the characters in YuruYuri, the manga just doesn't appeal to me.)