I lived that era too, and Snow Leopard was no less buggy than any other release. What actually happened is that engineers had been shifted over to iOS, which delayed Leopard. By the time of Snow Leopard, to put a positive spin on that lack of resources, Snow Leopard was a "no new features" release...even though it actually did receive new features as well as new bugs.

There was even an infamous data loss bug involving guest accounts (https://www.reuters.com/article/lifestyle/snow-leopard-bug-d...)! But people have forgotten about that and only remember the marketing now.