Horizon won't terminate

I am new to Horizon and got it setup on a remote server to test out. I am trying to build a system that is going to launch a bunch of jobs across many worker servers to process a lot of data from external apis.

I got horizon installed and could never get the web interface to work, even though I'm using "local" as my environment. It just says not authorized without even providing a login screen.

Anyway, I'm trying to figure out how to stop Horizon altogether but even after running php artisan horizon:terminate it doesn't seem to stop it. I look in htop and I see dozens of lines shown here: https://snipboard.io/9ZriDS.jpg

I'm stuck and don't know how to get it to stop running.