Some of the most misleadingly named Anime are the LN adaptations with really long titles.

Take for example the currently airing My Status as an Assassin Obviously Exceeds the Hero's at 5 episodes in how the Assassin protagonist compares to the Hero does not feel like remotely the point at all.  Now this could change later, but I don't see how it could ever over take everything else the show is currently about.

But for a more nuanced example let's look at my personal favorite Anime that has this kind of title, In Another World With My Smartphone.  The protagonist's Smartphone is a prominently used plot device but it's not what the show is about.  For myself and I think most other fans it's true distinctive feature is it's approach to taking the non Monogamous resolution to it's Harem.  It's no longer the only Anime or even Isekai to do that at all, but it's distinct approach to it still stands out to me as the best which I already wrote a blog post on.

Since it's so popular to insist Mecha shows aren't actually about the Giant Robots, I should be allowed to argue that the Smartphone Isekai isn't actually about either the Smartphone or even really being an Isekai.

As far as I can tell the first Anime with this kind of title was My Little Sister Can't Possibly Be This Cute, and it is indeed one of the least misleading, it conveys that the story is about the relationship between a brother and sister that may or may not go in an incestuous direction  But even then is Kirino's "Cuteness" really a deciding factor in why anything happens?

So why does this happen?  How the do the stories that devote the most words to titling themselves most often get it wrong?  I can't even say this is an example of why you shouldn't prioritize plot over story in how you title something because I often don't even think they're the best descriptions of the plot.

Remembering how a lot of Light Novels started as Web Novels on random websites, I feel like these sentence long titles were often originally writing prompts the author was using to get themselves started but never something all binding to what the story became.

But it's interesting how there are Anime with single word titles where I still struggle to deduce how that word at all describes the show.  Yet none of those titles feel actively misleading in the way one of these sentence long titles that at the very least does accurately describe an aspect of the story.