Encouragement for silver and bronze players

Maybe this sounds familiar to you: Top feeds and continues to; Jungle farms and never ganks, pretty much useless to the team; Mid afks; ADC fed and rage quit; support... for example adc+support have total 4/27 K/D at the end of the game. i think their behavior and gameplay need to be improved. i have an idea that at low elo like bronze and silver players gets more LP for lower deaths and having more CS and more assists based on their positions. and if they feed and have more deaths something like more than 7 they lose more LP than normal. because it is not fair when mid laner try hard and have good CS and low Deaths but your adc and supp may feed and lose the game. in situations like this players with better CS and low deaths lose less LP than normal and players with more deaths and low CS lose more LP than normal. i think in this way bronze players will be encouraged to have good cs and don't dive to enemy and not to die easily.