I've never done freelance work before, but I have a lot of video-related skills that I'd like to market and find work using. I always make it a point to do research on web sites before I commit to anything. I'd like to join a freelance site, but reviews I've found for a variety of them are consistently bad. I'm not talking one or two disgruntled clients/workers, I mean consistent 1-2 stars and horror story comments across the board.
How do I gauge the safety of a particular freelance site when almost all the reviews I find warn you to stay away?
Edit: Not sure how this is too broad, but I'll try elaborating a bit more. An example of one review site I've checked is SiteJabber. If you search the name of a freelance site such as freelancer.com or upwork.com you'll see loads of reviews from people who claim they've gotten their accounts frozen/closed, lack of arbitration (from sites who claim to have it), and so on. It's hard to know if this is the vocal few or not.
Every review site I check is like this, so clearly I can't base my decision on that. I'd just like to know several freelance sites that are reputable and proven to be safe to join and use when looking for work.