Matchmaking in nutshell
Bronze/pre-30 game
Bronze player belongs here and is actually pretty average, plays random champions he never played before
Silver player flames Bronze because he thinks he's better, usually plays low skill floor champion (

. Unless he manages to find weakest player he's going to feed badly. If he finds him and manages to farm him its game over.
Gold player acts like god (LUL BRONZE TRASH, I KNOW THE BEST), plays flashy champions such as

. Will feed and throw if anything goes wrong.
Plat player spams laugh and flashes his mastery "on cooldown", plays FOTM
or powerpicks
and either gets beaten because FOTM champions won't work against fed Yi OR gets fed as fk and becomes one man army.
Diamond player is mostly quiet, manages to gain large gold/xp advantages in lane... however because he picks champions with more utility and less raw power, he gets owned by that 10/0 Yi who got fed on bot lane. Life sucks man.
** Plat/Dia game**
Bronze player has no idea wtf is happening, feeds his ass off.
Silver player flames everyone because suddently his
doesn't work. However, he will somehow farm up and still oneshot everyone in late game. Too bad his decision making sucks and ends up dying in 1v5 every time.
**Gold player **rages and blames every mistake on his bad luck. Usually ends up like 0/10 because he picked snowbally champion.
Plat player does well, gets few kills... basically, his early game is pretty good. Luckily for his enemies, he can't close the game and tries to force teamfights regardless of situation.
are GOD at this elo.