Would Zaha have done any worse today? Instead of standing square to the full back and smashing it at his legs, he might have at least had a go at getting in behind. Valencia and Young just don't seem to have the guile to want to get behind a defender. Zaha is no world beater, but he does at least want to take a man on and get the ball into a dangerous area before playing it. As winger, you're more dangerous if you have the ball in the penalty area, with the full back taken out of the equation. If you're just wellying it into a packed penalty area right out on the touchline from infront of the opposing full back, there's little chance of scoring, especially since neither Valencia or Young can cross a ball anyway. Zaha gets a lot of flack for being a bit of a waster, and he most probably is a bit of a waster, but I can't fathom how a winger could be any more negative and ineffective than Valencia.
I can't imagine his team mates enjoy his approach either. If I'm a centre forward, I don't want the ball smashed at me like he's taking a shot and I'm the goal! It's difficult enough to attack a cross, but to attack a cross being belted at you at 100mph? It's a ridiculous idea.