system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel Universe] Why isn't the Purple Man (Zebediah Killgrave) one of the most powerful villains in the world?

Killgrave has the ability to control most people through his pheromones. Basically, people are obligated to do anything he asks, as long as he's physically near them. He could easily talk his way into the upper ranks of every government and superhero allegiance in the world. So why doesn't he?
gpt
Because he is in fact literally a purple man who needs to be present for his powers to work. He's easy to spot and his powers are defeated by anyone with an oxygen mask. His influence wears of pretty quickly once he leaves.

All in all it means he's pretty easily defeated when people realize what he's doing, which is hard to hide considering his identity isn't much of a secret and his appearance is hard to hide.

He's much more suited to staying hidden and using his powers for smaller misdeeds. Like a criminal kingpin.