apps wont transfer after ios5.1.1 upgrade

apps wont transfer after ios5.1.1 upgrade. This upgrade has me pulling out my hair. the device is running very slow and apps wont transfer back into the ipad from my library. anyone else having this issue? what do i do about it? is it possible to roll back the OS? Thanks for any help with this matter. And a curse on whoever came up with this so called upgrade!!