There are probably others, but off the top of my head I can't think of a more "one step forward, two steps back" player in the entire National Hockey League than what Tyson Jost is.
Was disappointed in Dach as well, you could probably throw that game out the window, but I was honestly more impressed by Patrick and Smith in their very limited NHL action when they were rookies.
I'm kinda surprised Dach is still in the NHL to be honest, I thought they'd send him back. I don't think this was the year for him to make the jump.