Did not specify i was gold last season. I was Silver 1 and 2 most of last season.
I use my own KDA as a metric since I need to play with players either equal or better in skill than me to move up. I do not use my KDA as a metric of being good.
KDA is especially useful in lower ranks, high deaths or low KDA is a good indicator of bad play or limited game understanding and its a compilation from all games so it gives an even distribution for those who are more consistent. Alternatively, in higher ranked play, KDA matters less in comparision to coordination, team comp, lane matchups, objective control, etc but is still a good indicator of good play.
KDA is your (avg kills + avg assists)/deaths
Cheers, much more enjoyable night playing with better players