ballanced you say ?
ballanced right now or ballanced in his kit ?
ballanced right now are champions who have 50% winrate or are realy close to it
ballanced in kit ... well not many
we have loads of champions who have their main power loaded into some toxic interactions
like kalista who is either op or up depending on her opponent
yasuo for the same reason as kalista
the thing is that riot never realy created any profile of ballanced champion, they just say that ballanced champion is the one who fights you equaly
so their champion designers arent realy bound in any way or by any set of rules to create equal champions
we have champions who are specialists in their own field, who are ballanced when you put them vs other specialists and perform badly vs generalists
and we have a group of generalists who tend to do everything they can, they are ballanced vs other generalists and fairly more abusable vs specialists just because they have a better array of tools
i could go in depth of why generalists wreck specialists, but let me say it in couple words without going into details
specialists are usualy countered by a set of tools that counters their kits specialization, generalists are often to have those tools stucks somewhere in their kit
in the end this lack of direction from riot creates the thing we call the lack of ballance since there is too many levels to ballance on and there is no place that they can drop the ballance
darius wont be as good pick as lee sin, because darius is made to deal with meele enemies who cant outjump him, this means that darius doesnt get ballanced to face ranged or mobile opponents
while lee sin is a generalist, he is ballanced vs opponents who can perform many tasks just like him, so he isnt ballanced to fight people who do less stuff than him