>but innovation has slowed to a crawl and he has failed to diversify Apple away from having one product (instead he just added a bunch of accessory products and services).

Apple has definitely slowed down quite a bit under Cook. But that is comparing from Apple's best to Current Apple. iOS 13 and macOS quality has definitely slipped. Along with the extremely long denial and no reaction pattern of Mac, Mac Pro and MacBook Pro Keyboard problems. But they are still Innovating like hell on iPhone, iPad, Apple Watch, and AirPod. Getting a decent iPhone out every year, which also happens to be the best selling Smartphone around the world is no small task. Services is also growing, although I am still not too fond of the idea of Apple TV, Arcade and News.

Those so call "bunch of accessory and services" would have been a Fortune 2000 company on its own, and likely to be Fortune 500 soon if not already.