Since the turn of the century, La liga teams have won 10 UCLs compared to 4 from the EPL. La liga teams have won 11 UELs compared to 3 from the EPL.

LaLiga is the best league in the world. Premier League is the most competitive, but being best is more about quality of play rather than competition. I am not saying that it's bad thing being competitive, but that shows how inconsistent top teams in Premier League are.