It's a marvel!
If you are like me, you love well-written bad guys. Isn't it funny how they drive a story? Without them a hero has no incentive whatsoever to become superhuman. On the other hand: Most bad guys are really creative! They are entrepreneurs, scientists (however mad) and visionaries.
In my series "Marvelous" I depict some of my favourite bad guys even though some of them are not strictly speaking Marvel villains: the Green Goblin, Kingpin and Magneto. They are hidden behind their mortal enemies, it could not be otherwise...