Surrender
In my opinion, the surrender vote should only require a majority 3, rather than 4, and the timer should also be reduced to 15 minutes or even 10.
Most people will say that's stupid because you don't know if you can come back and win the game that early. The thing is, you can ALWAYS come back and win. Even if you are down 0-100 with 3 inhibitors down and they have 5 dragons and Baron, you can STILL come back and win that game. So really, by that argument, the surrender function shouldn't exist at all.
The truth is you don't surrender because you think you are going to lose. You surrender because the game has become unfun or maybe even toxic. You surrender because you don't want to play that game any more with those particular team mates. So why force people to play a game they are not having fun in, which is probably going to turn into a bunch of people raging and crying for reports (as usual), when you can instead defuse the situation by giving people an early way out?