Maybe people like you have a lot of luck and really don’t have problems. Or Apple users doesn’t have much expectations anymore how an OS should be. iOS is far from good at the moment. Not only my experience. And you don’t have much more to use. Windows Phone is dead and Android isn’t much better. But I don’t see a reason to buy very expensive Apple devices when they don’t even work how they should. My AirPods Pro suck too. Disconnections with Pro and the 1st Generation on all devices. In the last 12 months I’ve got a few newer devices and same problems there. Using the keyboard as a trackpad to switch to a word, mark them and more isn’t possible without problems anymore.I am sorry, but it seems it more on your case specific rather common problem. 13.3.1 is the best in my case, however as I use iPad I still update to 13.4 for mouse and keyboard support. 13.4 feel slightly more battery consume than 13.3.1.
So what’s better? Paying a lot more than 1000€ for an iPhone with an crappy OS or paying a bit less to get an another crappy OS?