The point is, that the beta test phase of iOS 13 shows that this release will not be ready for a september release, but apple decided to release iOS 13, ignoring all complains by the testers and developers.There is a difference between going fantastic, normal, and a disaster. Not everything is a disaster.
Apple gets out software updates pretty quickly (clearly, because people are complaining it's actually too many) so the mistakes are addressed far more quickly than Android.
In my own meaninglessness and anecdotal experience, I had a Note 4 and there were so many bugs that never got fixed, I switched to iOS. It's night and day.
I never had so many unfixed issues during the 3 month of beta testing iOS and macOS as I had on this year's release. Catalina is as unfinished as iOS 13. I don't recommend anyone to update before holiday season.
It's not a big deal to release a software 1 or 2 months later than advertised, when it will almost free from serious issues. I remember times, when Apple released a software or hardware "when it's done", not when investors are worrying about their stock value.
Apple should switch to a 2-year-intervall. For hard- and software. It will be better for quality and better for the planet, because people will use their devices much longer. I know too many who will update their phone every year (sometimes more often) just to have the latest and greatest ePenis - not doing anything more than Facebook and Whatsapp...