I'm sure Blatt is, at least, partially responsible for his exit. Via his personality or whatever.
That being said, I also see a CLE organization that is absolutely petrified of losing Lebron again & will do anything in their means to keep him happy. Lebron knows this and uses it as leverage. Not far fetched to see CLE capitulating to his needs. Organization is in the ultimate win-now mode & the window isn't getting any larger. Isn't hard to see Lebron hanging this over their heads.