I would say that out of 12 bosses or grandbosses I've had who significantly influenced my job, 8 were actively good, 1 was pretty neutral, and 3 were really bad

I would say that out of 12 bosses or grandbosses I've had who significantly influenced my job, 8 were actively good, 1 was pretty neutral, and 3 were really bad (and caused me to leave those companies.)