So, I got the bad ending at just under 10 hours, keeping in mind I probably have an hour or two of AFK time as well. I don't feel as if I've been rushing either. Of course, the game really opened up just before the bad ending, so I know there's some stuff that I haven't yet explored and at least 1 boss available that I didn't kill yet. I just came upon the bad ending without any warning really.
Ah, I see. I don't quite remember when I reached that point, but I went and killed some other bosses first.
I hope people don't think the game ends there.