> don’t back up to cloud.

You should be doing this in case something happens to your phone and you lose everything

> close my apps when I’m done with them

It’s actually better for your device and battery not to close your apps. iOS already does this and keeps apps in the memory to preserve battery and you manually closing them messes with it.

As for the heating up, your maybe the third or so post I’ve seen with heating up on 14 Pro using YouTube and reddit. One post the other day was using YouTube in PiP and was experiencing the same problem. Also, what reddit app do you use? The stock reddit one is pretty trash, always use Apollo.

You could try a factory reset before taking it back.