[jageen]

I am not sure about the problem you listed, But I am iOS developer since 5 years,

major issue in apple product started since release of apple map, (we all know how bad it was).

Then there is a couple of major issues in OS updates to, iOS9 update which convert iPhone to iPod (No mobile network) http://osxdaily.com/2015/09/24/ios-9-cellular-data-not-worki...

Can not forget to point out security issue recently macOS suffers (Leak administrator password in plain text format) before that You can even perform remote login to any computer using administrator by putting password field blank(If target used did not set administrator password)

I think quality is somewhere sacrifice due to high pressure or something else.