Too Much Damage

I've been playing for a week on a few accounts after a break of over 2 years. Why does it feel like everything in the game does twice the damage as it did in season 3? Teamfights last 5 seconds. Tanks being bursted in 3 seconds. Single abilities doing half your HP. Abilities that bounce of other targets doing a third of your HP. I even played super tanks, but that just made a team reliant game even more team reliant.

I remember when this game used to only have a handful of BS at once, but it seems like riot just made everything hurt more and thought that was balancing for a better game. Even back in 2014 you can play well and go legendary and carry a game guaranteed, but now it doesn't even matter because anyone on the enemy team with lower level and half your farm can burst you to death. Tell me, what's so fun about being one shot every game? Is this just to appeal to new players? I really want to start playing this game again, but all this damage, man.