I don t think this ranking system is what we need

I know everyone tell this but ranking systems are not precise , is preety hard to win with Nunu or supp.(which are the champ and lane I like) due to fragile mind players.I know what you say if you are good you will go over but I am not that good I don t say I am good ,but compared to my most teammates I am a god.They start losing early and when I make lvl 3 and try to gank the enemy is allready 3/0 .So I decide to try take objectives , I will go solo even if my teammates overextend while losing for my jg to take some kills.I do most objectives but they get tilted and say is my fault they lose 1 vs 1 fights and mostly when I try gank they troll let me die and then continue .I truly try my best(even if sometimes I just give up when I can t carry they or 2 + teammates are afk/inting , and I know I can t win ,just watch anime and not focusing about what I do in game ,this is why sometimes I end with bad scores.) but I feel that in the match we are all mixed .I play with players which have a Iron gameplay(most)-Gold.I would love to see the system giving lp over the scores objectives farm etc . Let s say is a basic 20 lp ,If you get some dragons positive kd and more farm than that divisions farm /min you get a bonus 5-10 lp .It apply at lose too instead of losing 25 you will lose 15 .I find the ranking system really imprecise .Thanks for reading ,sorry if my English was bad and if you are a higher rank and whant to see why I can t win you could spectate me and help me improve I would appreciate.