In flex queue, groups should only have 1 vote for surrendering
If you want to keep flex queue playable for solo players, you need to make some huge changes because premades keep abusing the solo player.
http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2381431474/47022294?tab=overview
this game, the premade fed the enemy before the game enemy started, proceeded to never come top while i got ganked several times, then refused to surrender multiple times and then threatened to report me.
http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2381378649/47022294?tab=overview
this game the premade is trolling the entire game and refuses to surrender, they even said they were trolling
overall these games are a toxic waste of time
if there is solo + solo + premade of 3, 2 votes should be enough to surrender
also solo players should never get autofilled, get banning rights and first pick priority over premades