-- (Please lets not do the fanboy "Flash is garbage" here - even if you do feel that it was heating up your CPU with ads - it would have taken a lot less than 8 years to fix that then to reinvent everything and find out that money still makes the world go round.) --
To say that Flash on mobile was great but Apple killed it anyway, gives Apple way too much credit. Flash on mobile killed itself.
Just discussing monopolies and drawing parallels.
To be fair Adobe was always pushing Flash as a cross-platform, cross-browser system - mobile browsers kind of changed the game and required a different approach since they were so tightly coupled to the OS and controlled by its vendor (BTW there was also a time where Microsoft was accused of monopoly for bundling its browser with the OS - doesn't seem to apply to iOS though).
If it was supposed work cross-platform on 2 mobile platforms - and one platform says no, well then 1 platform is not cross-platform any more is it? Adobe then gave up and stopped developing it - but yeah, Apple effectively did kill it. Especially since it was still a very early try. I mean up until 1-2 years ago even normal css/webanimation was laggy on mobile browsers.