Don't play League on Friday night.
Elo hell isn't limited to a tier. But it ABSOLUTELY FUCKING CAN AND IS heavily correlated with time of day/day of the week. And I fucking bet riot can clearly see how toxic/troll/afk behavior and SHIT matchmaking is usually at the same fucking time every week.
Good luck improving when every game during elo hell night is an all-chat roast and 0/15 smiteless jungs and duos who decide never to leave fountain because your champ/summoner spells/build weren't meta #lcs enough for them while they are 0/3 at 5 minutes.
NOT ONE FF TO BE HAD either - kda's have to be padded. Operation fountain farm is go.