With Chelsea, apparently the reason Pochetino leaving was by mutual consent was because they weren't happy that he hadn't pulled a miracle out of his arse (despite their strong finish to the season), and he wasn't happy that Todd Boehly was refusing to give him a significant say in transfers.
Can't say I blame Poch for wanting to go in that situation. I expect he'll land on his feet. Meanwhile, Chelsea will continue to flounder while their clown of an owner is meddling.