I’m not complaining. I’m asking for some evidence this app is trustworthy.
Security is not binary. Having root can be bad for security, but it doesn’t have to be especially if you’re careful about what apps you grant root to, which is the point of my original comment. Having root can also be a security benefit because it offers more opportunities for detecting and blocking harmful and privacy-invasive apps, as this app does (if it’s trustworthy).
I don’t think F-Droid with the official repositories is a negative for security either; I suspect it’s less likely to contain outright malware than Google Play, and I’m sure the average app on F-Droid is less likely to be privacy-invasive. Adding random repositories suggested by strangers on the internet can be a different story, and asking who can vouch for the one suggested in this thread seems like a reasonable mitigation to me.