Under Jobs, the company innovated. Under Cook, they copy. Why haven't shareholders booted him out?
It's bad that sales have dropped. The iPhone 6se [?] isn't selling. The latest iPad isn't selling. The iPad Minis took away sales that could of had people buy the higher revenue iPads [regular sizes].
Too many security issues of late.
El Capitan started as a dud with major upgrading issues. Took 2 further updates to correct [most?] the issues.