I'm primarily an Android user, but awhile ago I carried 2 active phones. I liked to switch it up with other OS's. I had a Lumia 920, and then I had the opportunity to trade, with a bit of cash, for an iPhone 5. After getting the iPhone 5 and starting to use it, my first thought was, "Now this is a real phone!"
WP is unique to say the least, but it's still quite buggy and immature. It's also missing a lot of features that are present in iOS & Android. Some people like WP (I think the reason is often because they like Microsoft or Nokia, or because it's NOT iPhone/Android) and put up with its shortcomings, but you obviously are not one who's willing to do that. I recommend returning it before the 14 day period is over, and get what you want. 2 years is a long time to be forced to use something you don't like or gives you trouble.
I've since deactivated my 2nd line, and I sold the iPhone 5. I again have a 920 which I bought very cheap, but I use it WiFi only. I'm carrying it mainly to keep up with WP's progress. I wouldn't say I'll never primarily use a WP, but they have a lot of ground to cover first.