I think the feeling of lack of innovation, is the current saturation / maturity of markets that Apple is involved in. While we don’t have as many “One More Things” as we did in the past, quite honestly, neither has anyone else in the laptop, smartphone, or tablet market.
While each side has had a few awesome “ticks” in the evolution of their devices, Apple is no different IMO. If anything, one thing they are doing awesomely at, but, not getting credit for, is their advances in making ARM architecture Silicon blazingly fast and efficient.
You must not have been an Apple user when we transitioned from OS 9, to OS X. It took multiple releases (not patches) before some major bugs were resolved within that OS. In a similar note, there were plenty of bugs during the transition from PPC to Intel hardware. And even with these bugs, the release of iOS 11 doesn’t feel as buggy / issue prone as did iOS 7.