Why would he be happy to begin with? Borderline all-star on a team missing a few pieces that does not seem intent on going to get those pieces during that player's prime. Why wouldn't he want out? Why did Durant bail out on OKC? In the end, anymore, the money is a given. The worst players in the league will now make more for a crappy 3 year deal than Stockton did his entire HOF career. It is no longer money that is the motivator (Bird rights mean basically squat anymore, unless you just can't live on 300 million and just HAVE to stay put to push it over that 330 mill mark), and "loyalty" went out the window decades ago. It is just the chase for the ring, and LeDickhea....uh LeBron started the "build me a super-team to guaran-damn-tee me a ring" trend. So of course Hayward is leaving. It is what the NBA has become, and it likely is not changing anytime soon. This is the world we live in folks, get used to it.
Oh and by the way, the odds of that "super-team" ever being built in the City of Utah asymptotically approaches zero.