To be fair the public / developer betas this year were pretty good compared to iOS 13 betas. It looks like the internal testing changes somehow improved things:
https://www.bloomberg.com/news/articles/2019-11-21/apple-ios...
https://www.bloomberg.com/news/articles/2019-11-21/apple-ios...
Probably also has a bit to do with Apple actually making efforts to improve, whereas others seem to make efforts only to copy Apple. Which doesn't help the situation. For consumers, the ideal, in my opinion, is competition on innovation, not really competition on who can be more "Apple-like".
https://web.archive.org/web/20090414133729/http://tomkarpik....
With premium prices come premium expectations. If I buy a $3,000 MacBook Pro, I do not expect the colossal screwup that was the butterfly keyboard design defect. That's a hardware issue of course, but in general Apple's software quality has gone down, down down.