No — obviously not all of them. While it's possible to come across a sports betting or online gambling website that cheats on their players, has unreliable live dealers or rigged software, you will definitely avoid it if you stick to licensed platforms approved by trusted gambling commissions. The best way is to opt for local online casinos (if there are any in your state, of course). In this case, you will be protected by your local authorities and will easily file a complaint if you face some unfairness.