It has come across my mind to start from scratch but I have over 6,000 events imported and there is no bulk delete option within the plugin. After much research, it seems the only plugin that will help with this is the Bulk Delete plugin. However, it is only deleting 50-70 at a time. I submitted a separate support thread about it here. https://theeventscalendar.com/support/forums/topic/bulk-delete-events/#post-1331937
This is a very frustrating issue. I am considering reverting back to a different plugin at this point.