“Once sleekly sculptural,” architect Ben Van Berkel’s Millennium Park pavilion “now resembles a beaten-up jungle gym.” Zaha Hadid’s pavilion is also showing wear and tear. “It’s easy to point fingers at Van Berkel and Hadid for creating dazzling pieces of sculpture that failed to anticipate how people would behave. Yet it is also true that star architects need tough clients to say no, when they come up with designs that are beautiful but impractical.”