LP System

Hi guys, i want to share my opinion about LP system and i really hope that this will be taken into consideration the thing about LP is lately if i lose some matches due to "playing bad, having AFKer mid game, having a troller with a bad day" etc, even if i played so good and i did my best and even if i got S, I'll still lose like big amount of LP due to my low MMR the same thing goes to winning even if i carried my team I'll still get low LP like +15 or something due to same thing "low MMR"

so what i wanted to suggest is, since I'm already playing with teammates that are same category as mine based on the new ranking system. why does LP calculation goes to MMR? let's expect that it goes to how i play inside the game if i played bad, I'll get a C, C on lose -21LP and for winning +14 because i don't even deserve to win.. the idea is that C gets the lowest winning LP and the highest losing LP and the LP amount change based on my grade if i got an S and lost then -15LP and if i got S and won i get +21LP

like that i think will be more fair, and even if some1 trolled/left the game and made me lose, i wont have to lose like big amount of LP although i played very very well and I'd be able to carry him if he just didn't AFK/troll

I'm just giving example on myself but i know that it happens with so many players around

It's my 1st suggestion ever and i really hope i could briefly say the point.. thanks a lot for letting me say my mind and I'm looking forward to see feedback