I concur. My wife and I both have iPhone 4's and while iOS 6 has a lot of neat features, the buggy nature of it has reduced our phones to steaming piles of crap. Most of the apps, including Apple's crash repeatedly or simply don't respond to input at all. The App Store will only occasionally let us see our previous purchase list. The Remote App only pretends to do what you tell it, but in reality does nothing (i.e. pause/play is useless). And my personal favorite... the ringing phone that you cannot swipe to answer!
We have both done factory resets, including a full reset that wiped the phone back to it's default settings with no 3rd party apps and STILL the OS crashes repeatedly. I used to reboot my phone maybe once every few months, now it's at LEAST once daily. We are both due for upgrades, but if this is how Apple treats their customers our next phone won't be an iPhone...