Due to WordPress plugins handbook recommended to remove options from _options table. (Here is the link https://developer.projectdmc.org/plugins/plugin-basics/uninstall-methods/ ).
Your plugin may need to do some clean-up when it is uninstalled from a site.
A plugin is considered uninstalled if a user has deactivated the plugin, and then clicks the delete link within the WordPress Admin.
When your plugin is uninstalled, you’ll want to clear out any plugin options and/or settings specific to the plugin, and/or other database entities such as tables.
Less experienced developers sometimes make the mistake of using the deactivation hook for this purpose.
But your plugin leave a lot of junk inside _options table!! This is not good. I don’t want trash in my DB when I don’t want the plugin anymore (uninstalled).
So, please delete them on plugin uninstall OR at least has an option (button) to manually delete them before uninstall.