iOS 11.1.1 update deteriorates battery life and automatic quits applications.

this is some thing which everyone should be worried about. I never expected some upgrade to deteriorate the ongoing performance of a device.

My iPad is not even one year old, and the latest release(11.1.1) quits apps, installed from App Store. battery performance should increase rather than decrease.

I have read some people also complaining about the same, also the new update is for the latest iOS device. My device is not even a year old for the matter.

its high time apple when you need to think about retaining the old customers rather than focusing only on new sales.

I want my device to work the way it did before the latest update.