End game victory/defeat allow voting for enemy MVP
TLDR: Allow voting for the enemy(not ally!) MVP at the victory/defeat animation at the end of the match before entering the stats and post game wrap-up.
Often there are games where the trash talk gets out of control. One player thinks he/she is the only reason for the win or thinks they are the best on the team when in fact they may not have been. Or on the other side people may blame a single role being poorly played but in reality the lane was overwhelmed by many factors including but not limited to not playing well.
So I propose a fun way to express player's opinions anonymously by voting for the enemy MVP at the victory/defeat animation when one nexus is destroyed. Where it normally says continue, perhaps all five of the enemy avatars and names appear and only one may be clicked to cast the vote for that enemy player.
There are situations where a tie may occur, such as a single vote for each, or two votes for two different people. In which case the tied votes on those players earns them each an MVP. So a single vote for each player then the whole team is an MVP(which will happen, but rarely). Two for two, then there are two MVPs, which also does happen.
Do not allow voting during any surrenders. That is trivial as a full game wasn't experienced. And for those games that have been very nearly won where all towers and inhibitors are down, a surrender perhaps could yield an MVP selection.
I might be wrong, but perhaps it would encourage people to rethink surrendering so often because those who often initiate surrender votes often are the ones with a comment on everything, think they are the best, but are usually not doing well themselves. A vote at the end showing how the enemy saw your team's MVP would maybe clarify the situation.
There are arguments against this as well, but it just seems like a really fun addition. Sometimes you feel you are the MVP, but you weren't. Sometimes you might not think you were doing well, but the team found you to be playing well even though they stomped your team and won quickly.