You couldn't be more wrong.
Tanky DPS has always been a problem in this game. Take it from a player from Beta.
And the tanks/Jug/Bruisers/Melee or whatever you want to call them have ratios that often do 1:1 damage or worse they are given true damage.
If you look at all the armor reducing abilities too they all have to do with a tanks/jug/bruiser/melee
It is kinda dumb that you can build completely tank and still do crazy stupid damage due to abilities.
Jarvan Dragon Strike reduces the armor of all enemies hit by 37 / 39.8 / 42.6 / 45.4 / 48.2% for 3 seconds.
Renekton Slice and Dice, when empowered by having more than 50 Fury, Dice will reduce the armor of all enemies hit by 40.5 / 44 / 47.5 / 51 / 54.5% for 4 seconds.
Sion Roar of the Slayer reduces the armor of the target hit by 20% for 2.5 seconds.
Trundle Subjugate reduces the armor of his target by 44% to 58% in the next 4 seconds (the effect does not apply any stacks). The armor reduction lasts for another 4 seconds after the drain completes.
Vi Denting Blows reduces the target's armor by 44% for 4 seconds after every third consecutive hit.
Wukong Crushing Blow reduces the armor of the target hit by 37 / 40.5 / 44 / 47.5 / 51% for 3 seconds.
Xin Zhao Challenge reduces the armor of targets hit by his basic attacks or Audacious Charge by 40.5% for 3 seconds. Only one target may be challenged at a given time.
I think you are personally bothered by the AP and AD Ranged Carries going full Lethality/Crit at the end game.
Well to that they deserve that kind of damage. When did you ever hear of Wizard (magic user) not getting stronger for starting as a glass cannon. Same for AD Range champs building damage or nothing.
If you want to just rush in the middle of a fight and butt heads like all the other Tankie DPS .... well I would argue that just doesn't show skill.