One one hand maybe they are hiring because the guy is overworked. On the other hand maybe they treat people like crap regularly and this is an early sign. If the job or $ seems good maybe give it one more shot?
Well that’s usually covered at the end of the second interview if they want to move forward with you. I’d give it at least that long before you bail unless you see some kind of red flag.
I sometimes like to sleep on it when I need to make a big decision. Often I will wake up knowing what to do.