Manchester United defender Harry Maguire felt Wolves offered "nothing" outside of their two goals following Boxing Day's 2-0 defeat at Molineux.
United, who had Bruno Fernandes sent off just after half-time for a second bookable offence, were condemned to a third straight defeat in the Black Country.
Matheus Cunha opened the scoring for the home side before substitute Hwang Hee-chan sealed the points with virtually the last kick of the game, converting from Cunha's square pass.
United offered little in the way of an attacking threat over the course of the 90 minutes, though the first half was fairly even.
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