The position of tanks vs damage in the game

So I've been playing for like 3 seasons now and when i started i thought tanks were a little hard to deal with my friends at the time told me that they would get nerfed and i have still not lived to see this magical day come to existence i play assassins and bruisers and adc basically anything none tank so yes i may have some personal bais but honestly i play these because honestly when i play tanks i usually find the game is a little too easy or rather its unfair to who im fighting i tried the broken stuff i really have but after testing them for a few games i never did it again it was too unfair i played the tank ekko i played the klepto viktor i played the tank fizz the int sion i've tested them all and god as my witness after every time i said "this is not fair" and didnt go back to it .Went off tangent for a sec there but my point is when are we going to see the day when it doesnt take 5 people to deal with 1 person building tanky why do i play something like say riven vs a sion and he has more AD,HP,Armor,shield,and wave clear than me because he built tank and a tiamat while i built armor pen like black cleaver, lethality, or even as far as a last whisper, i know alot of people will tell me things like i'm mad or i dont understand how the game works and so on and so fourth im no lcs player but i think i know at least a little bit of what im doing after this long.To anyone who has taken the time to reads this thanks . im just tired of things like me doing my combos 5-15 rotations on a tank while dodging everything but the second 1 thing hits you they kill you with minimal effort or having in the one in a million chance per say you beat something like sion in lane and he just ignores you and walks to kill your tower while you cant do anything but have your whole team try to help you stop him,i know im not important enough as one person for a rioter to talk to me but even a couple general posts here would be nice why cant we do something about all these tanks not even asking for damage dealer buffs cause that would make adc life even harder .The assasin burst was nerfed the non tanky bruisers are basically borderline useless these days ,the shielding supports were nerfed if evferything else in the game was a problem before why cant we do something about all these tanks . just a couple examples of some of these things cho gath r doing so much tru damage to the point he can 1 shot basically anything he wishes that is none tank especially with stoneplate sion rebirth bursting people before they can even say damage,him having the ability to constanly eat towers alive and his shield that the second you are close to killing him he presses it and gains almost have his hp in health ,also why does his e for some reason proc grasp of the undying(i have checked this it really does or at least the time of me posting this it does) viktor's latest build that makes him unkillable due to his passive already giving him a massive amount of AP so he can afford to build to build tank items and have a never ending shield and movement speed while slowing anyone who dares to fight him nasus - yes i said nasus the champ everyone always says to just put behind/camp to win the spin is you cant control people so you cant force a camp and even if you do try to put him behind its not the easiest thing depending on who you are playing he has passive lifesteal and with his q scaling and building tank items he will eventually do all the damage he needs just with q and can we talk about why his ult is so overloaded percent hp damage hp gain cooldown reduction and he gains more armor and magic res while he's using it per second? come on now people hate on yasuo and akali but for christ sake you catch them you kill them and you dont need your entire team to deal with them if you play better than your oppenent there are many more things to ad to this but we've all had that moment were even garen simple as it gets just elimates your hp while you are unable to do anything about it in a matter of seconds even though you have been trading with him all the time but hey he's always full hp even though you poke him alright i open myself to the opinions of everyone i just hope at least 1 rioter will think this over a little we arent lcs teams that prain for hours together we are people who go into few games a day with each other you cant give us these things to fight that would require lcs teamplay and coordination to fight all the time.