Haha no worries! I see what you mean. 

I took the ask to mean “favorite villains” not “villains that are well done” and, well, “favorite” doesn’t equate to “well written” always for me! It’s kind of a grudging respect for Overhaul’s (as you say) fleshed-out well written villainy (like that’s how you write a good villain without any set up for or hints at redemption!) that gets him on the list, whereas people I like or find sympathetic were higher because that was how I was ranking lol.

If I was going to rank it by “villains I consider well done” I’d rank it like Dabi-Shigaraki-Overhaul-Twice-Stain for a top 5. 

And yep, my grumpiness with him is related to Eri. 😦 I pretty strongly dislike any character who hurts a child. If they get redemption, great, but in general I won’t really like them. See: Endeavor. But seriously all my least faves from each of my favorite series are characters who go out of their way to hurt children (the Zoldycks and Ging from HxH, for example).