i am support sona main and it is super hard to get S rank

hello i am support sona main. i used to play to win and collect mastery points on a bunch of different champions but now that we have 6 and 7 teir my satisfaction post game has dropped tremendously. after every game i see people who did well get S-, S, and S+, but for me that is never the case anymore. I do well in game as well as support sona getting a ton of assists and one to three deaths and during the game i feel like my supporting ability is very effective and i feel like i am really contributing to my team's success. despite this, i feel like the game does not recognize this and for the past 8 games i have gotten A+ 7 times. whether i do well or just ok i just get A+ and im not just talking about my score i mean in game too.

when i lose i dont feel good from getting A+ and when i win and get A+ i feel even worse because the victory feels hollow. it feels like im not really winning because i played that game and i gave effort so i can get the S rank.

i understand that the system compares you to other players of the same champion and role but sometimes i feel like i have to live up to an unacheivable standard to score at least an S-. at this point im not sure what to do or how to change myself because i know my playstyle is different from other sona players but i feel like im still good at what i do. either im 1/1/13 or 2/6/20 or 4/9/26 I always get the same result: A+