Why there is no counter to invisiblility?

Its called invisibility for a reason.

Also many champions have ways of pulling people out of invisibility now.

because good vision was too toxic to the health of the almighty jungler.

which part of invisibility, there are two. stealth an camouflage.

stealth is only revealed by control wards or oracle lens. or for champions any skill shot assuming you know where they are.

for camouflage just be right up next to them. you'll see them.

Because Riot feels more easy and lazy to remove stealth weaknesses , even if rengar proof to be broken then he got nerf to the point he can be detected in a specific range ...

I feel like the champions who were too weak being stealth ,they shoulded get reworked to work in better kite to aproach the game.