So I decided to download the new software and I cant stand it. I don't have a computer to plug the device into. So can and how do I do this?
If you have a rooted Android device, yes it is possible to downgrade your device. You must have a custom recovery installed on your device that is specifically for your phone model and either a stock ROM of the Android version you wish that is also very specific with your phone model or you could install a custom ROM (I.e. CyanogenMod). You must then install the ROM by using the custom recovery.
If you don't have a rooted device, I'm afraid it's not possible.