Also it's not like even objective shortcomings invalidate your enjoyment of something. Some people seem to believe they're only allowed to like things with deep literary value and consequently will start seekign reasons on why their favourite story is actually a contender for a nobel prize in literature, Perhaps admitting to flaws in something you like is no different than owning up to flaws of your own.
I love Nanoha but a lot about it is kind of shit, and I don't even mean the occasional underage fanservice.
Honestly, it's often flawed gems that inspire the most passion, as something about a work engages people, then they try to rationalize or fix its flaws. Nanoha, pre-TERF Harry Potter, White Wolf RPGs...