Not sure how any of that is a “disaster”.iOS 13 so far is a disaster. With a late release on the 19, and immediately scheduled the next .1 update on the 30th and delay the iPadOS release on the 30th as well mean a lot to me. It does make me believe they know iOS 13 is not quite ready yet.
I'm afraid I"ll have to stay on 12.4.1 for a while on my main device. Just for security purpose, how long can you keep a hold version with decent security protection?