Hi there @ostonegi
We really appreciate your honest review.
We’re working on improving the plugin, as far as I am aware you should be able to select an existing standard Google merchant account (not multi account Google merchant).
But yes if you have a multi client Google merchant account, it’s not supported yet. Our developers are working on, hopefully soon this will be supported as well.
I see that you haven’t submitted any support request. Feel free to create a ticket with us so we can assist you with the plugin setup.
Please contact us at WooCommerce.com > My Account > Support. You may need to create an account before you can access that page.
We will be able to help you further there.