Hi,
You might wanted to post a support ticket instead of a review but anyway, I would like to help with your case.
It is important to know that GTM4WP does not include any GA tracking code directly. If you see any active GA tracking, that could be for one of the following reasons:
#1 It is located in one of your theme files directly
#2 You have an active native Google Analytics plugin next to GTM4WP
#3 You have a published GA tag inside your GTM container
#4 Another tag in your container loads this GA tracking code for self tracking purposes
If you see that this unwanted GA tracking code disappears when you disable GTM4WP, the first 2 options are not your answers. In that case, try to change the container ID in GTM4WP options to a fake ID, like GTM-XXXXXX
With that, GTM4WP can stay active while your real GTM container is not loading and executing. This should also remove the unwanted GA tracking code while GTM4WP is still active. If this happens, either #3 or #4 is the answer which can be only answered by examining the content of your GTM container.