I haven't used BB10 yet, but I am willing to believe you. However, I think the issue is that success on the mobile OS market is determined in a large part by the ecosystem around it. The ecosystem is heavily influenced by network effects (i.e. the more users, the higher the value of the network) en BB is way behind in this aspect. They still have many users but the amount of apps pale in comparison to Apple and Android.
If Apple, Android, Windows and BlackBerry would all have started at the same time, we would have seen different results (maybe). But the simple fact remains that BB is very, very late to the game. And once market dominance is reached, as Apple and Android have, competitors can only change that dominance by being dramatically better. And I get the impression that BB10 is somewhat better.