How far should I be reading into the fact that people outside of Israel leaked this info so quickly? Does it mean the US was very unhappy with the attack? I doubt they were happy with not being given a heads up.
That said, the existence of the state of Israel is such a contentious topic that the leakers may have been motivated by politics as well as the above, sure. But I doubt state-level agencies are condoning the leaking here.
Some people (often due to trauma) have a very different relationship with secrets than you describe. Some people get immense satisfaction from holding secrets, and have no issue keeping it that way. Sometimes those people have other flaws or vices, as often plays out. In my understanding, managing such people is its own meta-game within these professions