Why is incompetence bad? I have no ego and don't have a way of judging things like this. I think I am unusual in not having an ego. I can't assert that anything is "bad" or "good", including incompetence. I understand "incredible" here. I also understand "gross", although "surprising" is a bit difficult. I have no ego, so no reference of what is surprising. For those with egos, surprising is usually in reference to the ego.
For example, a tebibyte of RAM is surprising to an OSX programmer. A tebibyte of RAM is not surprising to someone working on seismic simulations for oil extraction.