The Windows phone was loved because it had excellent Nokia hardware. The software was not loved and the app store was lacking.
Sad that we are stuck with Android and iOS basically now.
I'd still take WP over Android or iOS.
The app store was definitely lacking. In my own circle of real life users I did not meet one person that did not really like the phone (software included). Granted this is just my own experience so very limited but its also a group of non-technical people just sharing with me. I never heard one complaint in fact it was usually more accolades.
Biggest flaw at the time was Google's shady nonsense involving banning Google Maps/Youtube on Windows Phone without a native app.