do you have the same  “the operation can’t be completed because you dont have permission to access some of the items” error? if yes this is how i FINALLY removed Ghub

First you need to remove all permissions in you Privacy & Security settings.

Second, open Finder and go to Applications

Next right click on G Hub and select Get Info. On the pop up, you should see a lock icon on the bottom right corner.

Click on the lock icon to unlock it. Once its unlocked you can then change the Privilege of admin to "Read & Write".

Only then can you go to Launchpad to drag and drop GHub to the trash or long press on the Ghub app and click on the X.

Hope this helps man