Already try but still happen 

Do not update to iOS 13

buggy, when i toggle apps, it close the app even when setting allows it to run in background, e.g. waze and i go to whatsapp. i come back to waze its killed
battery life seems significantly worse (i guess apple do it to make you upgrade, since last time they were caught slowing down the phone, now they drain the battery faster)
it runs hotter

these are my personal findings on iPhone 7 128GB. don't have to disagree with me or anything. its what i am facing now.

i regret upgrading to iOS 13, but screw it, cause i'm collecting my iPhone 11 on Friday.

Update Requested...

Not granted yet.

Honestly Apple is back to their old bullshit ways of forcing people to upgrade their devices by (what I believe from my limited experience of my own device) intentionally crippling the older phones.

Before iOS 13 update, there were no such issues. On a plus side, when I freshly installed iOS 13, it "felt" faster than before, launching apps, swiping home screen. I guess because they were sued for slowing down the performance, now they drain the battery.

Since Steve Jobs left, the monkeys don't know how to make a better product so I'd buy it, they resort to making their existing, older products more crap so you're forced to upgrade. 

anybody still on ios 13.4?

should i change to new SE? only considering as SE having 2 sims. currently using 7+