It’s Just a Prank, Bro
There are actually two jerks in this scenario. The first is the customer who purposefully purchased every loaf of bread so that other customers couldn’t get a sandwich. The second jerk is this Subway sandwichery for actually selling the bread to this customer. If Subway limited how many loaves a single person could buy per day, nobody would have this problem.
But no, Subway did the deal, and now, nobody can have a sandwich. We honestly hoped this was a prank and that this scumbag was going to return the loaves. In that case, he wouldn’t be a scumbag and we apologize. But he didn’t, so the scumbag statement still stands.