Yeah, that game turned pretty ugly from a pitcher's perspective. Don't come down on Vazquez too hard, though. He did, after all, allow less than one baserunner per inning, and thew runs were partially the fault of an awful bullpen performance.
Sometimes stats aren't very fair: Leiter was hammered, but wasn't charged with a single earned run, while Vazquez was charged with six. Nevertheless, Vazquez pitched a much better game. Keep your trade offer up, but if nothing comes of it, just be patient. Vazquez will put up much better numbers soon.