there is nothing GREAT about this guy.....you saw a LOT of NOT great stuff in a very short period of time. and any one of them is enough to say seen enough thanks, gotta go.
things you could ask yourself:
Why was unemployed, with no activities or interests, supposed depression etc not enough to say No Thanks.
Why was him showing up intoxicated with an open container in his car to your first F2F "date" not enough to say No Thanks.
Why wasn't the vomiting/yelling at self, and saying abusive things to you not enough to say No Thanks.