Except for the Apple Watch I had all these products. They were some of the best of their time and even hold up today in terms of design and usability.

Your definition of success seems extraordinarily high, if these products were failures. Maybe measured by items sold. But then each of them stands in nearly every single design museum like MoMA, history books, and were clear stepping stones to the Mac mini (cube, sunflower without display), and ipod/phone (newton). So bottom line they were a clear success to Apple’s enormous brand value.