Honestly, lets introduce a new LP gain/loss mechanic.

If you have a very very bad game. Like the game I just got from my Yasuo teammate where he went 0/9/1 with just 9 really "unlucky" deaths, you should lose significantly more LP. Because if you aren't going to ban people for unintentionally intentionally feeding, then at least force them to give a fuck that a shitty "intentionally feeding-like" score will cause them to lose more points. I realize that playing for KDA isn't always the way to win games, but going 0/9/1 is the way to always LOSE games. I'm fucking tired of getting these types of players that soft int the moment the game throws any difficulty at them.

On the flip side, if you have a very good game. Like, you go 24/5/10. Something that clearly indicates you smashed the level of competition in that game, you should gain more LP.

Stop telling me this is a 5v5 game when a majority of the time it is one player losing his shit and feeding both their laner and the jungler, which then in turn allows them to start pounding the piss out of all the other lanes with their "unfortunate" kill leads.