Seriously Riot, its not hard to understand these things.
Everyone does way too much damage, at all levels in the game. You removed the Armor/MR from the game, and gave everyone more AD and AP. More Lethality and MPen. The champions that don't take those get hurt.
So when you decide that damage is actually stupidly high in the game, don't forget to reduce the % damage reduction that is tacked onto every single item, kit, and epic monster. Because god forbid that you actually reduce the damage to reasonable levels and then someone is just sitting there with a 45% damage reduction ability LuLing as it takes people 2 to 3 times longer to kill them.
You need to go back to the game basics and redo the game from the ground up at this point. There are too many things that have been introduced into the game that you have decided to keep because of Uniqueness or Identity, which are stupidly overpowered. Disarm, True Sight Denial, Paddlestar (No one can defend this one, they had to repeatedly gut her for 10 months since she was released. That is a failed Design from the get go, at least when compared to Old Nidalee, it had a higher CD, and she had to predict every movement of the champion instead of saying Well I can throw around these things randomly, and if I also hit my E i can kill someone. Nidalee had to just land them, on a higher CD.
On top of that, we can tell the game is bleeding out players in the NA servers. A bunch of people on majority of peoples friends list have started dropping off. I went from having 150-200 friends online back in season 2/3/4/5 to having about 125-175 in season 6. To about 100 in season 7. To having at best like 80 in season 8. This is adding the fact that I still add new friends. Do something to fix this before it starts to bleed into the other regions. Because we all know its only a matter of time.