No, it just means it was acceptable. Doesn't mean it doesn't have its flaws that need to be addressed.
Making an ebook manager is a lot of effort for little reward, so I'm not surprised Calibre is the only one out there. I'm not sure why I'm not allowed to be unhappy with it regardless.
Man, the people here are unbelievable. Calibre isn't this unassailable icon where expressing displeasure about it is heresy. What was that post about people accepting that technology sucks? Calibre sucks. But people put up with it. But somehow I'm the asshole for expressing my dislike.
My god, reading this makes me wish there was an alternative to Calibre. I already just tolerate it because it's the only ebook manager I know and there are a lot of things about the UI and how it works that bother me.