Try getting into Toptal https://www.toptal.com/#connect-unmatched-coders-now It is good for both clients and freelancers because Toptal screens both for quality. I am there as a freelancer for half a year and am satisfied. It feels like they are looking after you, and you can pick and choose what you want to work on and how much. They will try to match you with the clients, or you can pick jobs, but they will never force you to do anything. And there is nothing like screen recording and tracking like in Crossover. Also, I would never work on Upwork or similar network where everybody can say about them what they want and bid on whatever they want (with low prices).
You can set whatever rate you want. You can set 1000$/h, but of course, no one will hire you. Anyhow, my rate on Toptal is much higher than what I could get as a senior dev in my country, so it is good for us and as I can tell from reviews much of the world. Devs from the USA complain but from what I can see there are still many devs on Toptal from the USA and many Toptal events in the USA. So to each, it`s own.
Another good thing is that you can be part of Toptal and have it be a backup source of work. You can choose your availability without any penalties.
As for the companies/clients of Toptal. They get tested devs, guidance (for inexperienced clients) and they have mediators (Toptal) who would guarantee the quality of the devs and intervene in the case of a problem.
It is best rated freelance platform, for a reason.