Espengler1,
I am sorry you are in this situation. I know how you feel, I too am a victim of iOS 6.
Unfortunately complaining here will not help because we are not Apple, we are fellow users.
If you want to complain or submit issues to Apple, you can do so here:
http://www.apple.com/feedback/ipodtouch.html
As for downgrading, Apple has made sure that if you upgrade to their new iOS you cannot get back if your not happy with it.
If you Google "how to downgrade ipod touch to ios 5" you might find some steps that show the only way to get it back which is kind of advanced. I can't say how well it would work. It seems kind of "messy"
If somehow you did get back to iOS 5 it may not be for long because apps will probably soon stop supporting your iOS and who knows what else Apple might pull on its paying customers. It just doesn't feel secure anymore.
If the iPod Touch is still new and there is still a warranty or something on it, I might suggest that you return it (if they let you) and get a refund, and consider getting a Samsung Galaxy Player. I believe it might work better for you, and you might just be happier with it. From what I've seen so far Google doesn't generally push its users past their device's limits and then force them to stay there. It may just be better overall.
If you are stuck with the iPod Touch 4 Generation on iOS 6, there is a way I have found that may make things a little better. When the device has a little glitch, problem, or is very slow when in an app, replay the issue so that it is currently happening. (e.g. launch "Temple Run" and get to where it is really slow) and do a reset.
To reset your iPod hold the home button and the power button down for 10 seconds until the device shuts off. The device will restart, and no data is erased.
The idea is to force the iPod to reset while the problem is currently happening. Oddly enough, this technique seems to fix minor issues. Go ahead and try it on issues that you find, there is no guarantee as to whether it will work or not, but it's worth a shot.
Beyond that there isn't much that we can do about it. I'm sorry.
If you have any other questions let us know.
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~Lt. Leviathan