As a really quick point, dating sites are quite explicitly not built for men. They acquire men at a far higher rate than women, and men ~tend~ to be the ones approaching women, and so pretty much every feature should (from an objective point of view) be designed to filter out men that women aren't interested in, so women receive fewer attempts at interaction from them.
The bias against PoC on dating sites is a serious problem, though. And tbh, the whole mess that is the online dating experience in general is a cultural one that dating sites aren't going to solve - it's a system which allows people to much more closely follow their biases, with essentially no risk of anything bad happening.
To be honest, as a woman, I don't know anyone of any gender who's had a good experience with dating sites (aside from using Tinder to find sex partners). My experience has been that I find most of my partners almost by accident through hobby/social meetups, or in the IRC social channels where I spend a lot of my time.