Tanks balance required

I do think the fact that tank champions like garen, Darius and Malphite can go FULL tank and still do more damage then your ADC it's bullsh*t. I belive that tank champions at all doesn't suppose to deal so much damage while taking so little (then what's the point having ADC if he die and doesnt deal the most damage). Tank should be tank and not high damage dealer, incrising the survive ability of them and lowering their damage is what I belive should be the best for the game. (back in S2 it was alote more balanced and fair)