any champ with a knockup is broken because tenacity doesnt do anything for it

Tenacity and QSS do not work against knockups. Your right. It is kinda broken in terms of that.... but then here comes Bard to save the day! He ulties as Yasuo ulties and the team cheers and shouts Hurray! Bard has saved the Day! That kind of team requires lots of teamwork to do well in all honesty. Knockups are just the peanut butter that sticks everything together, its the other skills that are the jelly to make them awesome and able to do much if there is no team work.