No one knows the real reason for Kris wanting to leave SM. All we know is that he doesn’t think it’s worth staying.
If I would guess, based on how humans normally behave, Kris probably has many different reasons, all leading to that one drastic decision.
But yes. It seems SM can’t give Kris what he wants anymore. It’s like any other relationship, really. (Only the contract make it a bit more complicated to part ways. Kind of like a marriage.)
Ridiculous rumours and groundless accusations won’t take away the fact that Kim Young Min has been doing a good job with SM and deserves more credit in general.
And to the other anon who thinks Kim Young Min is ‘evil’: if you are serious, all I can say is: child, you are blessed if you have been protected from the real evils of this world this far.