Welcome to AD / Targeted Meta
If your kit is not entirely targeted (or AD, with all the bullshit itemization), with absurd amounts of damage that Riot refuses to nerf, you lose, guaranteed. It doesn't matter if you are dramatically better at the game than your opponent, because their champion carries them and wins anyway.
But hey, it's SO fair and balanced for the literal easiest, safest champions in the game with the most reliable damage output in the game to be, by far, the strongest. Yep. That just SCREAMS "healthy gameplay".
So, welcome to AD / Targeted meta, folks. It sure is nice when gaming is literally built to pander to morons and whales now. Thanks F2P, I love you, so much.
I wish I could just go back in time, to when developers actually gave a fuck about the quality of their product, and didn't live 100% for money. But, sadly, that kind of developer died off a while ago, and now we just have greedy little fucks who were raised by society to be terrible people.
... Gotta love it.