That "bad hires" section describes a lot of people I've know and worked with and tbh, I kind of feel sorry for them. They're often incredibly intelligent people that want to apply themselves. We hired this one guy who constantly attempts to re-architect and rewrite various systems on his own, just to have his works rejected.

At the same time, some of these guys are seniors. How on earth have you been in the industry for this long and not grasped what your job is?