As a user of both Windows and OSX, it sounds like you don't know how to use Windows.
As far as the bluetooth issue.. In the two cars I use it in, one has been flawless, the other will have intermittent connectivity issues ranging from a delayed connection, to perhaps not connecting at all. This happens about 10% of the time.
Been and admin of Windows based stuff for about 14 years now. I know how to use it and I know the issues it has/had.
I do every day. I think you've been away from Windows too long. It works quite nicely.
Oh, and MINOR issues? Take off the rose tinted sunglasses, bub.
When it wants to. For the most part it's not bad. However, it's not nearly as seamless as OS X. See my response above, no rose tinted glasses here. Trust me on that one. Just stating the obvious. Apple has had some hiccups lately but nothing near as bad as MS.