You can uninstall AutoMate like any regular Android app. However, if AutoMate is set as a device administrator (required for some features to work), this needs to be disabled before the app can be uninstalled. Launch Android settings > Security > Device Administrator and deselect AutoMate, and try uninstalling again.
There have been a few reports of Android settings crashing when the device admin is being disabled. This is a bug with the Android operating system. In this case, please toggle AutoMate's "Draw over other apps" permission and try again. Please also temporarily disable any "overlay" apps that may be running in the background, and try to disable the device admin before uninstalling.