I want you to picture this:
A bronze player WHO love his league because it actually a good community, he thrive in that place meeting interesting people, then new season hit, he goes to rank, meet a FULL 4 man account full of Plat/Gold/Diamond smurf, he won but he was place into the wrong league because for all his preliminary placement it was a team of smurf that owned the other team. And now he is stuck in that rank that is toxic beyond extreme, and he misses the other rank where everything is just that chill. Normal is not like bronze 4, Because if you go tanky teemo mid in normal that is a auto banned, Bronze 4? AP Soraka Jungle??? AP Garen + Lich bane? sure why not, as long as you show up in the team fight.
In bronze We play as a team, and died as a team, have you seen a 3 man bronze jungle invade? that shit evolve into a full 10 man battle with the one dying first respawn and coming back to help their surviving comrade that still fighting.
Silver? "Dont worry im a diamond 1 smurf vayne, and i will be toxic to you for a long ass time"