If you have a bad plugin, You can discontinue use of the plugin, find an alternative plugin, try to re-install if see if that fixes the issue, or contact the developer/publisher of the plugin for help to see if they have a fix or patch for the plugin.

Using   FTP:

 

You will ftp to your site, then navigate to the wp-content directory:

 

Then you will see  your plugins directory:

Then you can disable the whole directory by adding “.off” :

This will turn off all plugins.

If you want to disable individual plugins:

Once in the plugins directory find the plugin:

Then you can disable the plugins by adding “.off” :

Using   Shell (command line):

(this is for advanced users who know command line, if you are not not familiar with shell/command line DO NOT TRY THIS! You can seriously harm your site)

Once  connected, you will navigate to the wp-content directory, and you will see plugins directory:

Then you can disable the plugins directory by adding “.off”  :

This will turn off all plugins.

If you want to disable individual plugins:

Once in the plugins directory find the plugin. Then you can disable the individual  plugin by adding “.off” :

If you have a bad plugin, You can discontinue use of the plugin, find an alternative plugin, try to re-install if see if that fixes the issue, or contact the developer/publisher of the plugin for help to see if they have a fix or patch for the plugin.