Guide for disposable sys-whonix replacement?

I don’t think an online forum in general (and this thread in particular) is the right place for elaborating my view. So I’d give you the high-level gist and leave it at that, if that’s ok with you. I have zero trust in the technical ability and the moral ethos of Whonix’ lead “developer”, which is problematic in a security-sensitive area (to put it mildly).