Is there a simple way to get rid of lollipop?

[AC Question]

Installed lollipop on my Samsung galaxy s4. What a mistake, since the install my phone is so slow and chunky, I miss calls because by the time it lights up and starts ringing it's already the 3rd ring. Email screen is painfully slow, I have to swipe/click 3 or 4 times before the phone even reacts.

Is there a simple way to go back to kitkat?