I am frustrated:( by several JEvents plugins that I can't uninstall:
JEvents - Calendar Restrictions
JEvents - Custom Fields
JEvents - Event Notifications and Messages
JEvents - Events Created by User
JEvents - Events for people
JEvents - Featured Events
JEvents - File and Image uploads for Event Descriptions
JEvents - Hidden Detail
JEvents - Popup Detail and Editing
JEvents - Record Event Attendance
JEvents - System JSON Execution Wrapper
JEvents - Time Limits
JEvents - User Specific Events

When trying to uninstall them from Joomla backend, I am getting:
1 - Error
JEvents has been disabled, please enable it first.

2 - Warning
Plugin Install: Custom install routine failure.

3- Message
Error uninstalling plugin.

The plugins are also creating too many redirects errors and it is time that I clean-up unused plugins.
I stopped using JEvents due to installation bugs, and I am now struggling to get rid of them.
It is also strange that the documentation does not provide a process for clean-up in such a situation. I am not the only one facing such a problem.