How exactly do you counter a tryn?

Basically the title. I'm currently in plat( last 2 seasons diamond ) and for some reason i'm struggling against trynda. I've played many games against him roughly ( around 400+) and i always lose against him in lane. I just don't see a real weakness to his splitpush because he can 1v1 just about everyone in the game so i takes more than one to stop him, which is real bad. I also see his early level crits to be a massive "fuck you" and the worst factor for his random chance to snowball because i feel cheated. The fact that he can heal a decent amount of hp after a trade and a massive slow/debuff to follow up makes it more oppressive to play against. If he does snowball then this ability makes it so much harder to escape, especially paired with the ultimate for an easy dive. Even if you build armour against him he may not kill you, but you certainly can't stop him from farming.

So please if any of you have some insight on this please advise, he's literally the only champ in the game i struggle against.....