These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Audience-Alienating Premise: The Protagonist is an officer of this world's equivalent of the Imperial Japanese Navy. More than one antagonist is strongly inspired by Those Wacky Nazis. Do we have to explain how awkward to get through these details can be for some gamers, even those who aren't into Social Justice stuff?
Broken Base: En-Eins Perfektewelt has been getting a bit of flack for changes in the gameplay, artstyle, etc. Basically turning something that was considered unique amongst Doujin Fighters into the same game everyone has played.