It says that (in general) people who do leave, leave because of bad management.
It does not say that people who stay, stay because of their managers.
Your statement may also be true or false, but it is independent of the original.
you wouldnt stay in a company because it have clean bathrooms
but you will surely leave if it has dirty bathrooms
having a good manager should be the norm having a bad one, is not acceptable
easy
It says that (in general) people who do leave, leave because of bad management.
It does not say that people who stay, stay because of their managers.
Your statement may also be true or false, but it is independent of the original.