We all know about those Trynds that try to spin into the middle of us and wreak havoc.
Yeah, the ones that die really fast and don't really bother us.
This comes from being underfarmed and underleveled. From being denied it.
There are several ways to counter his "OMG HIT 700 CRIT WTF" stage. For example, you could perhaps build armor besides the normal Zhonya's Hourglass or Wriggles. I oft see only those items as counter on three's, but in reality, you should have your jungler or a bruiser top build a Frozen Heart or Randuin's Omen. They slow down Tryndamere's DPS ridiculously.
You could also play a counter in ranked, such as Pantheon. When I used AP runes and masteries on accident, and Tryndamere had proper runes, I could still win early fights.