Tryndamere had like 72% win rate in normal games
and that's why everything was nerfed in this kit
base stats healing AD debuff spin's cooldown ulti duration crit damage crit system (being low on health=more crit)
Tryndamere was never picked by pros, since his release (except rainman) his rework screwed him (before he used to dominate new players). He needs a second rework because right now he is nothing.