I had no problems installing 14.0. No misbehavior of any device. I figured 14.1 would be a small fix, and it is causing lag on every screen, freezing up requiring hard reset, and it is infuriating. I have never had a problem with any previous apple product. And my phone (though older model) was running PERFECTLY prior to any of these updates, same for all our other devices. I hate that every time there is an update, it is optimized for the newest models and causes issues in the older ones, or just unexpected behavior that we have to mitigate to restore a perfectly working phone back to itself. Planned obsolescence, of course! I can't complain because the android users say switch to a better platform and the apple users says just get a new phone. I don't want a new phone! My phone is (WAS) perfect and I don't need one, or didn't until this crap 14.1.
My daughter's phone needed to be factory reset during failed install of 14.1 Then it said it couldn't restore from backup because latest backup was in 2018, which is BS. I backed it up before 14.0... but the backup wasn't found in the cloud. I guess that's what I get for trusting that apple's cloud backup would be flawless. So all her text messages are gone, and who knows if the photos can be found on the cloud?!
Prior to this, I could literally go months without needing to restart my device; and now I need to restart it every few hours. Way to improve, apple!