It’s not Agile’s fault
Yes, yes it is. You don’t judge a system by some ideal that can’t be achieved. If it’s a system meant for humans you judge it based on what it does to said humans.
If agile makes managers more insufferable, then maybe it’s not a good tool for the problem at hand, working in companies with managers.
I have read those principles, many years ago.
Those principles sound great but they are not compatible with management.
If management is gonna be part of the picture then agile principles are not beneficial to a developer experience, regardless of what unachievable ideal they talk about.