After studying countless champions, There are THREE concepts that can never be balanced.
- Opposite scaling.
What is opposite scaling? It's when you build an item that gives you the opposite effect,
Such as
Builds frozen heart, Hits harder. Buys a tear ( an item that makes you stronger once completeled ) But scales when he buys it.
Scaling off ''mana''. What is ryzes bann rate in the LCS summer split atm? Around 85%. Whats his win rate? Pretty high :].
Yes his kit is completely weird and lacks counterplay but it wouldnt be such an issue if he didnt do such high damage with magic pen also involved. Basically he builds defensive items and gains power.
Builds Spirit visage, Hits harder.
''I built tank but can kill your adc faster than an assassin can''. These boards are FILLED with volibear complaint threads. Hes sitting at what a nice 54% win rate and its been about 2 months i think like that.
Now this falls into the other problem too. ''I build tank but do more damage then you'' This is usually a kit thing such as kindred and graves.
Point being is building certain defensive items gives you an additional opposite effect of power. Which is extremely unhealthy.
- Invisibility
How many threads/nerfs/banns have been made to

Here is a thread where Meddler posts about rengar http://boards.na.leagueoflegends.com/en/c/gameplay-balance/rnTcz9fg-riot-is-rengar-really-getting-reworked-at-end-of-season?comment=00010000000000010001
Invisibility in League will NEVER be balanced. its not a ''buy a pink and ur good'' Yes this is true in certain situations
but the whole problem isnt buying a pink, its ''The whole other team has to completely change the way they play the game (all 5) for 1 person on the other team''.
Invisbility lacks counterplay in itself, I dont mind some of these champs but im basing my results on complains from a lot of reviews.
Remember Evelynn? What happened to her? :]
Remember shaco? Still banned in high elo streams.
Rengar? Being talked about by Meddler saying he needs a nerf
Twitch? Also talked about. His Ult has the ability to piece any squishy faster then zed can.
Not saying Twitch is broken but the aspect of invisibility is just not fair in itself.
- Small Risk High Reward
This section is basically champions that have little risk but for some reason gain a fuck ton of rewards for it.
. ''Let me completely fuck up in which id die if i was almost any other champion in the game but i can just press R while continually hitting your adc for bruiser type damage''
''Oh my team is dying? Let me press R and force the enemy team to either get inside for the heal or back off''
''I built a tiamat but can tank anything now because i pressed R''
''Got caught out? Its ok i got another flash''
''lol bruv try to kill me''
''Doesnt matter how bad i am. I pressed Q one time and we got baron + 3 towers + inhibs ''
''i have a skill that is an AOE, Does 40-50% of your health upon impact, then continually hits you with 250% movement speed for about 10% an auto with a burn effect... All because i pressed one Button''
Garen is just the definition of a ''braindead champ''. Lacks any counterplay, Has a Juggernaut Follow up thread saying by 2 Rioters that Garen himself Lacks almost any form of counterplay.
''I silenced you and pressed R'' Boom you're dead.
Now this is NOT to diss anyones champion. Im not saying kindred is EASY to play. Im not saying she requires no skill. Im saying that these champions have something in their kit that makes their reward for using it too high.
Such as Annie. Lets talk about the skill difference.
Annie bot mains Annie. He presses R and kills 3 people.
Faker who has played Cass has to be mechanically skilled beyond measure to accomplish the same thing.
Ekko. Ekko makes a shit ton of positioning mistakes that anyone would die if they were in that situation even said tanks, but presses R and its fine.
Ezreal broken? No but why is an ADC actually killing Assassins. Ive watched plenty of high elo (d1+) streams where zed / kassadin DIE trying to kill an ezreal. And these are mid mains im watching.
Ive watched Berg completely melt from the IBG build, as zed.
These are just my opinions, I read the boards all the time and read peoples complaints. And i think i can say that the 3 aspects of unbalancing in any game comes down to these 3..
Of course there are champions that just do too much fucking damage like Zac for example mixed with CCs out the ass. But that can fall into opposite scaling.
but her ulti isn't one of them
and to a lesser degree 
and
. blitz really isn't as useful as the others after the fight begins.
or
to get the team out