Wanted to know if there was a command that allowed me to select all users (dont wanna do it via default group)

Looking for a way to have the permission from all users removed and is then awarded to some other user,
then removed from all users and then to a new player and so on

For ex - essentials has /eco give ** 1000 that selects all users

Thanks

Unfortunately PermissionsEx is currently unmaintained and no further updates are planned. Because of this, all issues are being closed. If you are looking for an actively maintained permissions plugin, take a look at LuckPerms. It is compatible with major server platforms and can import data from PEX.