Stacking Champions are Broken

Nasus and Veigar for example, are one of the reasons this game is slowly dying. Nasus especially(tank meta) wins the game on their own regardless of their own teams performance. Whats ridiculous is the inevitable win that will come if the game passes 30 minutes which is disgusting as a champion idea. For these champions they don't even need to build AD/AP because their passive does it for them meaning they can go full tank and proceed to do equivalent to the jungle or adc. The ability to stack just shouldn't be in the game or if they must keep it(cause its riot) they should at least make it harder to stack after awhile instead of making it EASIER. Its mind blowing to me that barely anyone talks about this when one ability can do 1400 in a point and click, or a 500 aa that is available every couple of seconds. I just think they could improve this if they made stacking MUCH harder rather than making it a broken mechanic that isn't nerfed because it isn't popular in LCS.