My view?
I think that if you get annoyed by someone putting Cantab or Oxon after their name it says more about you than them. Good luck to them I say. I hope one or all of my kids will one day get to do the same. If they don’t I’ll still be just as proud.
FWIW, I have a very average degree (with Hons) from a very average educational institution.
Why live life being negative? It doesn’t make you any happier to disparage others.
BV