Tryndamere's ult should be activable only if he has Fury build up or not at all when CCed

Why is it so you need to use everything to kill him, or he outsustains you, but he presses R with no effort involved and rightclicks on you twice, while you can't do anything?

He should be able to do that only if he's battling, not everytime he wants to. He should be able to do so with max Fury only, or at least 75%, OR not being able to do that when CCed, because noone can deal with him late, especially in 1v1 scenario, because he splitpushes - ofc more can go with you, but then the rest of his team overpowers you and you lose! Like having a Tryndamere that's only slightly ahead is instant lose, because everything you do is a lose/lose scenario. You should be able to time your CC right when he's dying so he can't ult and delete you nevertheless despite your previous effort, even if he didn't touch you for all the time (maybe if you're ) and has no Fury, but his point-and-click slow and dash makes it that most of the characters can't do even that! Only thing you can do this way is counterpick him and having a better duelist, , maybe pre-nerf ? That is in no way satisfying nor acceptable kind of counterplay, hell these are all possible to be banned by one team!

Edit: If I'm salty? Of course I am! He built and killed me with TWO CLICKS with my whole team around me without any chance to get out, any chance of killing him WITHOUT his ult how tanky he was ONLY with that!