I'm surrounded by idiots.
~ Scar describing Shenzi, Banzai & Ed

Villains who are more likely to accidentally foil their own plots than the heroes they're fighting against, due to stupidity, bumbling, poor planning, cowardly behavior, carelessness, weak strength, equally more incompetent henchmen, or arrogance on their part.

Incompetent villains can also have schemes that are ultimately stupid, pointless or do little to cause chaos. Sometimes their attempts at evil blow up in their faces by either causing them great harm or even aiding the heroes; thus, these villains are not really much of a threat but they can occasionally be annoying. They are mostly used in comedies. Additionally, characters who are stated or made out to be smart in the media they appear in, such as Dr. Ivo Eggman Robotnik, Dr. Neo Cortex, and Krang, can still be classified as incompetent if they meet any of the previous qualifications.

Since Incompetents are generally not dangerous, they are never Pure Evil and are very rarely Game Changers, no matter how "cruel" they may seem.