It has installed suspicious certificates.

I dug into this, and it looks like it has been fixed: github.com/rustdesk/rustdesk/discussions/6444)#discussioncomment-12039260 , and no longer does that.

So Rustdesk can be used entirely open source (since the proprietary management web UI is not critical), and it no longer installs certs.

So maybe it had problems a while ago, but it looks clean in these regards now.