LP gained shouldn't be fully based off of mmr.
I am not salty at all, just making a suggestion.
I played a ranked game, and I only gained 15 lp from winning. I was a bit confused, but I now know it is because that win made my record 24-24. But what I think is a bit unfair, is that I performed very well in that game. I was 0/3 at 10 minutes, then carried my team and ended with 13/5/23 with an S rank. And in my prior win, I gained 15 lp from an A grade going 4/2/12. I don't understand why mmr is the only thing that counts in to gained//lost lp. Why doesn't performance or grade have any effect?