My xbox can no longer keep up and is dipping and it is so jarring making it impossible to play ranked
That’s the trade off. If you want to be active in supporting the development of the Xbox platform then you are going to have expect to run into these issues on pre-release builds. If your only reason for being in them is to get features earlier, you should probably take yourself out of the program and go back to stable builds.
That’s an issue for the Preview forums, not here.
Be sure to leave feedback through your console’s feedback app and then head over to the preview forums on Xbox.com.