> I'm trying to coin a neologism here. Dismanagement is to mismanagement as disinformation is to misinformation. Mismanagement and misinformation come from incompetence; dismanagement and disinformation come from malice.

I've seen “malmanagement” used the way you seem to be trying to set up “dismanagement”, by analogy to the distinction between misfeasance and malfeasance. (Dictionaries seem to view it as a simple synonym of “mismanagement”, though.)