I gave blackberry a chance, buying one of their OS 10 based devices. But they simply don't get it. Boot time is measured in days.
Lots and lots and lots of snags and bugs and glitches still persist even though it is now 10.3.
They have services that keep running that then annoy you to log in, even if you don't want to (no I don't have a BlackBerry login, nor do I want one, and don't keep bugging me in the alerts).
They send spam alerts, for example when trying to offload their new failing handset models.
Cut and paste is a disaster.