One thing that particularly bothers me about Tryn on TT is that **** spin. It's a great move in general, but on TT that spin gives him absurd mobility. TT main distinguishing feature is, well, it's twistedness. Tryndamere has a manaless wall-jumping ability on short cooldown, with a mechanic for reducing the cooldown further.

On Twisted Treeline, Tryndamere becomes extraordinarily mobile because he can effortlessly cross the barriers that hinder the movement of almost every other champion. Any champion without a wall-jump ability simply cannot kill a half-competant Tryndamere, as his Ult + Spin is more than enough to get him to safety.

I hate seeing a tryndamere. NO MATTER HOW WELL WE DO and even if we reck the tryn. Late game he could be 0/-insert number here- and still be strong. Thats just hyper carries for ya =\

A simple solution is to either counter with another tryndamere or prevent tryndamere from feeding early game.