I think my preformance degraded

'Sup, so since s8 started I am sitting at 41% winrate which is rather strange cuz I came back last season after a S6 break and I had solid 58 winrate in high plat-mid diamond elo.I feel like nothing is strange It's just that I lose a lot more and yeah besides the Quinn top feeding and the other like 5-6 games where someone fed the entire nation of Africa everything else was bearable.Anyone having this degradation kind of thing?I feel really bad since when I try to make an argument a random kid checked my profile and says 41% what do you know but actually I have played double the seasons he had and my game knowledge is triple on his..Like I am in kind of a slump right now don't know what to do