Hello Nate,
After a couple of hours of debugging, I finally found the reason why the “Events” are not getting deleted. The reason is that they are expired events.
The “The Events Calendar” plugin is modifying the query and preventing my plugin from querying for events if they have already expired.
I have to find a way to temporarily prevent “The Events Calendar” plugin from interfering with the db query that is made by my plugin so that the events can be deleted.
I am working on a fix for this and it will take me about 3-4 days since I have to collaborate with that plugin’s author as well.
Once I am able to fix it, I will update my addon and will let you know.