The Bantams manager saw Jimmy Abdou put the visitors in front on 14 minutes. and take a 1-0 lead into half-time.
Dominic Poleon had a goal disallowed early in the second half, and Wimbledon rubbed salt into the wound soon after.
Andy Barcham added a second goal for the visitors on 59 minutes.
And six minutes later, Cody McDonald rattled in a third goal, firing beyond Rouven Sattelmaier.
With 10 minutes remaining, the visitors added a fourth, McDonald once again on target.
Bradford: Sattelmaier, Guy, Knight-Percival, Kilgallon, Chicksen, Reeves, Veincelot, Law, Taylor, Wyke, Poleon. Subs: Lund, Warnock, Dieng, McCarten, Brunker, Raeder, Gibson.