I left NVidia because I retired, not because I was unhappy with the managers or my coworkers. They were exceptionally good.
You do realize there are all sorts of reasons why people leave a job, right? I left Qualcomm perfectly satisfied with my managers and coworkers, too.
If somebody always leaves because of being unhappy with their coworkers, they may want to do some introspection to find out what those disagreements have in common.