Most Frustrating Game Ever

I had a game where I got 2 pentakills with I lost that game because my team absolutely despised winning, and refused to attack the nexus, we had elder and their base is completely open, 1 inhib mid and no towers, my team decides to go bot lane to try and grab an inhib, I disagree with that because their comp was very dive heavy, and going into their tower would get us killed instantly, and I wasnt wrong. I went mid to try and end the game when I got caught (leaving my team in a 3 v 4 that they didnt even bother fighting) my team suddenly died and continuously flames me for getting caught EVEN IF I TOOK A TANK AND THEIR HIGHEST DAMAGE CARRY TO FIGHT ME. I swear if we had just gone mid to the nexus we wouldnt have lost this game, why did I lose lp for a game that I made correct decisions for that my team doesn't understand. I dont get why my rating goes down because 4 monkeys don't understand how to win games, by hitting the nexus. I don't think my rating should go down, it should have gone up, because I did extremely well and made very good decisions.

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