Can't finish a simple task? Having a hard time figuring something out? Lack the ability to get things done? Then you might be suffering from incompetence.
Have you ever noticed how bad a lot of people are at their jobs, even though they do them every day? Or how often famous people screw things up, even very important things? Then you've already noticed that incompetence is a very common thing. Incompetence is a word for people and things that are ineffective, shoddy, or just terrible at what they're supposed to do. Incompetence is the opposite of excellence.