I wonder what happened to so many developers that turned them so jaded and cynical towards scrum and project management. So far I've dealt with the good and bad

I wonder what happened to so many developers that turned them so jaded and cynical towards scrum and project management. So far I've dealt with the good and bad of scrum with a good pinch of horrendous PMs in the mix, but I still came out of it with a positive view of the framework. It is hard to run it somewhat smooth and takes lots of motivated people to accomplish[1], but the result had a positive impact on my day-to-day work. 1 - Some people said that this can be a failing of scrum and I 100% agree.