Hackopotamus - Someone who is content with being bad at something, even whe

Someone who is content with being bad at something, even when it's simple to get better.

He still can't spell basic words and says 'I'm a hackopotamus, and I'm proud.'

She didn't learn how to use the printer and said 'I'm a hackopotamus.'

He still uses the same old phone and says 'I'm a hackopotamus, and I don't need to upgrade.'