Interesting findings. Bad/ineffective management can certainly make the working day seem like a nightmare.
Thankfully I've only worked under one bad manager so far. His inability to manage deadlines and work load allocation made me quite angry because it was then left to the design team to get the work out in short order. Trouble was, every time we succeeded, it covered his inabilities. He wasn't even a particularly good engineer and we all cringed when he got promoted.