A word to discribe Summoner's Rift's current state
Volatile.
At a single blink of an eye the game can shift into an unwinnable state. Which puts that much more pressure and fault on the first person who dies.
Mid died once. Which instantly causes a snowball effect that causes the other lanes to get devoured.
Top died once to jungler. The jungler snowballs into the other lanes.
Bot died once to bot. Now all dragon control is gone.
Tower first blood. Lethality. Tons of snowballing. Objective control. Everything just blows up from a single death. Just one.
Feeding used to be dying at least three times. Now, you die once and not only are you a feeder but you're also the catalyst to your team's inevitable destruction.