The phrase "incompetent ones" refers to people who lack the skills, knowledge, or abilities to do something well or correctly. They are not capable or efficient in what they do. Full definition
But if it reduces average teacher quality in other ways (by making it too hard to fire incompetent ones), it's not a free lunch at all. (nationalreview.com)
Launching a coup (and an increasingly incompetent one at that) against a leader just nine months after he was elected with an overwhelming mandate from the members, with no reason to believe that this support has significantly changed, is such an affront to democracy that adjectives to describe it fail me. (blog.politics.ox.ac.uk)
Competent campaigns don't always win, but incompetent ones rarely do — and Fiorina's ain't looking too sharp from here. (epolitics.com)