Go back three more drafts. Top 4 players in the 2011–2013 drafts:
Kyrie Irving, Derrick Williams, Enes Kanter, Tristan Thompson, Anthony Davis, Michael-Kidd Gilchrist, Bradley Beal, Dion Waiters, Anthony Bennett, Victor Oladipo, Otto Porter, Cody Zeller.
Every one of those players except Bennett has been to the playoffs. Porter, Waiters, and Zeller all had breakout years. Most of those drafts weren’t great, but the top picks have generally turned into solid contributors on good teams. It takes time to have a positive impact in the NBA.