Have you ever actually lost a lane,game, or duel to Tyrnd or Yi
And not been annoyed, irritated, felt cheated, stat checked or salty in one way or another? I can't think of a single game I've said "oh sick tryndamere is going to afk split push mid to late and we can't send 1 person to sop him because of how good his dueling power is even when not completely ahead. I've never said oh wow i can't believe yi cleaned upp that fight after spending 20 minutes afk farming an becoming a monstr because items. Oh cool trynd beat our top/jg lvl 1-3. because he's like the only champion that can crit that often early game. I feel like that was not just dumb luck.
Horrible design. Uninspired. Irritating to play against. Low skill cap. etc. Salt.

because the team is dumb. I've lost many games to a
who lost lane but got quadra kills because they won't die and our cc goes to the enemy tank.