The tooling is actually pretty good. Now the problem is a lot of the libraries I want to use are native android/java which means doing a lot of C#/java interop.
Ideally, you should be able to specify the java dependencies you want and get some magical interface file generated for you in C# that makes it so you don't have to think so much about the interop, or at least remove any tedium / boiler plate. If that's not there, then I'd say it's a tooling issue.
If you have some of those that you would like us to do, we would love to help you. Anything to remove the friction from using C#.