I bought from blackberry. I don't think I have rebooted since I got it. I "restored" all my old crap from a moto x. (I have a couple of apps I don't want to update. ) I did go manually update all the blackberry apps.
Mine ran through battery very fast the first two days, but then settled down. It runs warm, but not hot, and the battery lasts despite the warmth issue.
I haven't disabled the hub, but I'm not using it, either. Dunno if that makes a difference.
I'd definitely try a factory reset before throwing it through the wall.