POV Diarrhea

Lots of fantasy novels have multiple points of view. While this in itself doesn't bother me and many authors do this very well, I've read things where I think the author just goes too far and gives us the POV of characters that aren't really relevant. One example: I read a very enjoyable fantasy trilogy from an author whose name I won't mention, but late in volume three the author takes us into the POV of a "bad guy" to tell us how horrible his childhood was, presumably so we can understand him. I found this highly unnecessary. The author had actually done a pretty good job of setting up her bad guy through the other characters' points of view. I'm not opposed to doorstopper novels with lots of characters, but there has to be a good reason for each character's POV. I get the sense that sometimes authors just fall in love with their own characters and have to write from their point of view as a way to keep complicating the plot and delay coming to a conclusion.Right from the start of my novel, I decided to limit the POV to two characters. Based on recent critiques I may revisit this, but the change I will probably make is limiting the use of one POV rather than adding others, in order to address the criticisms. I've struggled with how to set up my "bad guy" and once wrote a page of short journal entries from his POV, thinking I could possibly insert snippets at the start of chapters, but that's a device that can turn some readers off. I'm still not sure how I will address this, but I'm pretty resistant to writing scenes from the bad guy's POV. I want my readers to get to know important characters without having to get into their heads. To me, getting into some characters' heads would feel like a cheat and take away the suspense of other characters wondering what they think.At one point I had a very vivid scene come to mind from the POV of a very minor character who became romantically involved with another character in a very unlikely match. I couldn't write the scene from the POV from one of my two POV characters, because neither one of them were there. The idea bugged me until I wrote the scene, knowing it would never make it into the novel. It won't, because it's just a small subplot, perhaps something like Legolas and Gimli becoming friends against all odds. However, the relationship itself does make it into the novel, as a POV character asks another what's up with those two and gets a reply from how the other character interprets things. Later, the minor character shares some of her thoughts with the same POV character. None of this required going into another POV.I've dashed this off rather quickly so I can feed the kitties and head out to work, so I hope it makes some sense. I'm interested to hear what other writers on my friends list think.