the x/10 rating system is absolutely retarded, mostly because it is very subjective.
Just take you like% on tinder (assuming you swipe like to everyone, or at least the bottom 80%) and plug it into this formula:
16.8*ln(yourlikepercentage)+52.3
http://www.wolframalpha.com/widgets/view.jsp?id=1f51953255f63027635d602d42b96718
for ugly guys like us, it will tell us our place percentage-wise compared to local males.
That formula came out of that study that showed how women rate men on tinder, you know the one that shows men are quite fair and women are hypergamous AF.
e.g. with my matching ratio of 1/2000 = 0.05% I rank on the bottom 1.97% on my local market 98% of males mog me.