As a person whose done it all, independent stuff, senior ic stuff, management stuff, the main thing that makes management terrible is simply that most companies have no support for middle managers.

You are a good IC? Sure let's promote you to management, but in 95% of cases, we're not even going to pair you with anyone or have a senior manager help you understand, build and grow - we're going to throw you in the deep end and have you sink or swim.

This often ends up with stressed out people used to doing well now approaching an entirely new problem with slow feedback loops and entirely different protocols than before, and the amount of burned out shitty middle managers I see is off the charts.