In part, I can understand your concerns.
But I've been looking for alternatives to my previous tools for a long time
An alternative would be: http://vestacp.com/
Problem here, code from Russia and the development is sluggish and it was hacked before.
A second alternative is: http://centos-webpanel.com/
The problem here is very complex and not entirely free, but very safe
Alternative 3: https://www.pd-admin.de/ or https://www.pdadmin-forum.de
Up to 10 domains free of charge.
I've been using it for over 10 years, never had problems with hacks etc. but not so many functions.
Several versions per month for the server environment and few updates to the AdminPanel