Conqueror rune Bloodthirster/any "heal on dmg" item still fn broken

When a Yasuo can heal himself with Bloodthirster faster than 4v1 can mow him down, there's a radical problem with the game.

Maining as Kayle, and seriously outmatched vs Illaoi top lane because of the latest Kayle early game nerfs, Kayle is so nerfed early game she cant even carry a lane vs most top lane champs without hugging tower and that champ massively overcoming CS.

I'm even running lethal tempo with AS bonuses and my "true damage" waves are still being healed over faster than my Nashors and Guinsoo items in AS can muster. He doesnt even focus on me, hes focused on the tanks, probably because that'll overheal him faster than me.

Why do people accept this as okay? This game is more and more fundamentally broken, when you'll nerf a Kayle for "too much end game damage" but allow a melee attacker to easily outscale any kind of late game damage that 4 or 5 teammates can deliver because its getting converted into healing.

You have to have certain caps on things like healing on attacks where you MUST disengage combat. You shouldnt be able to walk through enemy base with 3 towers shooting you, slashing your way through minions and have more HP than when you came in.

Nerfing priority should be looked at when a Yasuo or Yi can have 20+ kills per game on average, and <5 deaths. There's something wrong with that. Seriously wrong. Looking at win rates and ban rates is a mentally challenged way to decide on nerfs. Should be looking at average kills per game and then you'd find the real champs that need to be nerfed, which would include a Yasuo, Yi etc.