Why does Nokia destroy all their world-wide accepted OS' only to push Windows phone to focus US market - but then does it so bad?

Why does nobody over here (US) know about the Lumia? Why have I only seen one little crappy advertisement about it on TV (the Lumia 800 ads in Europe are much better). Why do Best-Buy worker not even know what a Lumia is? Why don't I see any people using windows phones over here (1 so far, a HTC)? People might think the US is flooded the same with Lumia ads as European cities, but forget it. Nothing compared to that.

And at last but not least: Why am I asked almost every 2 day about my N9: "Cool what phone is that? When does it come to the US? Gosh we are so behind over here with phones." - and this by females and males age 20-26 and older.

Elop is a trojan horse or just incredible stupid - 2 years ago I saw at least sometimes a single Nokia phone in a US store, now nothing at all. (btw I haven't been yet to an AT&T store)

Windows phone is the most burning platform ever, I hope WP will survive and gain more users since I don't wanna see only Androids and iPhones around. But using WP as a main platform is a companies dead. If you are a Nokian you might talk and hear about WP/Lumia everyday - if you're just a normal smartphone users, you probably won't even know what all that is about.

My post is not a complain about Nokia's strategy, but a way to express how I just can't understand what Nokia is doing...