Change klepto
I mean it's literally RNG the rune. Not only that but it's mostly used by ranged champions who abuse the hell out of it (especially against melees. In fact you have a better laning phase with it against melees [i.e. viktor, vlad etc.].
It's the only reason Kayle is so strong btw lmao.
Also in theory you can proc it 3 times (without it even having to hit your opponent you just need the empowered auto after using an ability to proc it) and basically get 3 sly stacks of gold which in theory can give you each 100 gold, total 300 gold which is basically a kill.
And if you think those theoretical values never happen, I've gotten 2 sly stacks of gold and one had 100 and the other 80, which isn't close to 300 but thats still nearly 200 gold for auto attacking my opponent twice.
Maybe change the rune so it's not as rng based? Or just remove it completely. And if you think the counter is that you loose damage for taking the rune, then take a secondary rune that gives damage or just look at the champion
who is the biggest abuser of klepto and is one of the greatest adcs.