I’ve never complained about an iOS update in my life until the last one, not sure why but it’s a battery hog compared to what was on it previously, tough to make it through the day without plugging it into the charger now no matter how much or how little I’ve used it. Not an old iPhone either, less than a year so it’s not the battery itself.
I vaguely recall reading about this problem. Seems like there was a fix or a workaround. Might do some searching.