While we are complaining about Vista, apple is not doing any better.
http://www.theinquirer.net/gb/inquirer/news/2007/11/02/leopard-buggie
to juz quote a bit from the above link:
One user said that Leopard was more like a beta than a US$129 upgrade and if Apple does not pull its finger out soon he was going back to Tiger. Generally the message summed up by one user was "Apple fix please Leopard is useless [sic]."
Lets face it, every new OS iteration, there will be problems. Give it sometime & things shud turn out fine.

I find Vista ok, juz lack of new app support & drivers for now.