Are we all morons for sticking with W10 mobile and is Microsoft going to screw us in the end?
Having had at least a few months on iOS and several on Android, I can safely say that anyone and everyone will be missing out on something. Those who do not use iOS are missing out on 3D touch and the universal clipboard. Those who aren't using Android are missing out on a lot of customization potential. Those who do not use WP/WM are missing out on live tiles and cross platform notification with another Windows machine (among other things) which is still the prevalent OS for PCs. Those who did not use Blackberry missed out on a secure device with a physical keyboard on a flagship (Sorry, team BB, that's all I got).
Long story short. As long as you made the conscious decision to give up whatever the other platform offers because you gave another feature priority, then no, you are not a moron.
If, however, you just followed the crowd and ended up regretting it, like my old boss did, then maybe.
As far as MS screwing anyone. I personally am not happy with the way they handled or managed their mobile devices. They missed several tricks that could have shot them to the top the way Samsung did. But speaking for myself, I cannot say that they screwed anyone. They never announced anything they reneged on as far as we, the users, are concerned. And as far as retrenching, we have been told of this quite the while ago. I'm still here. You're still here. The OS is still here (for now).