Tryndamere could learn from a lesson that you gave to Irelia
The lesson to Irelia
> Passive - Ionian Fervor > Champions within 1400 ⇒ 1000 range of Irelia count as nearby > No longer grants tenacity based solely on the number of nearby enemies > Now grants tenacity based on the number of nearby enemy champions compared to the number of nearby allied champions (Irelia counts as one ally): > More Allies than Enemies - 0% tenacity > Evenly Matched - 10% tenacity > Outnumbered by Enemies 25/30/35/40% tenacity (at levels 1/6/11/16)
Tryndamere had long been known for toxic play patterns , either beating you 1v1 or using his ult to run away if he gets outnumbered. But this could all be fixed by changing his ult;
Undying Rage grants Tryndamere immunity to death for an amount of time based upon level and the amount of surrounding allies/enemies. More Allies than Enemies/Evenly Matched - 2/2.5/3 seconds of Undying Rage, which can be extended to 4/5/6 seconds by auto-attacking an enemy champion. (1 second per auto attack until maximum.) If Outnumbered by enemy champions - 3/4/5 seconds of Undying Rage, which can be extended to 5/6/7 seconds by auto-attacking an enemy champion. (1 second per auto attack until maximum.)
This way, Tryndamere sees less of his snowball if ahead, run away safely if behind/ganked. An ability called "Undying RAGE should involve fighting, not just be a fix all for losing a fight/misplay.