Fuck you tryndamere, and your lack of weakness.
Literally not weak in any point of the game. Pre 6 advantage as random crits, free heal, resourceless. After 6 you can beat him down with as much dmg as you want, but this crit asshole can just pop his ult and either run away or bash you down from 50% hp in 4 seconds. He doesn't really have much counterplay other than run away. Lategame we finally pinned him down and knocked him up, but somehow he manages to pop his ult, kill one of our team and spin away. In a 2v5. This is almost Darius level broken. Riot don't want to nerf Darius, Garen or Fiora, who usually get banned, but can they at least nerf Tryndamere so you can actually have a chance at stopping him lategame? If whoever you have on your team with hard cc is awful at using it, you're screwed. I think if he's being knocked up or suppressed or whatever, he should not be able to use it. Rework him into less of an unkillable assassin and into more of a tank. Keep the ult part but the crit has to go, or at least be less likely.
Tryndamere is not remotely broken, and he has huge counters in both champion and item selection. Anyone with CC and kiting ability can take him down. Anyone who blinds can take him down. Have neither? Build a Frozen Mallet and take him down.

gives you a huge advantage.