so today I ( ascendant 2) queued against 3 ex immortals and I went 17 - 3 and we won, i was MVP it was a 13 - 1 win I had a 43% headshot rate I was entrying and hard carrying with 3 4k's and I clutched and won us 3 rounds. but i got + 16 rr?

how does one do that well in a game and gain the same as if I were 10 - 20

is it just because of how inconsistent I am? does my mmr know it was just a fluke XD