Is incompetent management bad management ?

@atheist Fully Agree

Yes.

@atheist in this scenario they are a waste of money and a wasted opportunity for a good leader to take over. Still bad.

@rEaL-jAsE Technically yes , politically no

@atheist Negative impact...

They cost money without profit?

@atheist are you considering a dev-peace-of-mind point of view, or the business perspective?

I would say that incompetent is a degree of bad, just less bad than actual bad :)

@atheist incompetent management that gets out of your way is actually in the top 20% of the best management around.
Managers who are constantly obnoxious and rude are more frequent than not.
Answering @Zer07777 's question, I would say that there is a provable correlation, but not a very strong one.

Do other kinds exist?

Is an incompetent Doctor a bad Doctor?

Yes it is. Is it evil or malicious now that is another story. Incompetent is always the opposite of good else you would not call it that.