Non-technical direct management.

This tends to include many of the things listed by others here, like not having estimates accepted at face value (because they don't understand development), lack of communication of business goals (because they believe developers just implement, they don't understand "product"), lack of consideration of developers' ideas (see last), deadlines without input from development (because developers will inflate their estimates)... But for some reason, developers can't just learn management, they have to find someone "skilled" from the outside, technical understanding be damned.