From years of practice I have seen people from different overseas (incl. those unis you mentioned) being retained in int firms/big fours and I have also seen many local grads for fail to get retained and some from local unis who didn’t make the cut. Although there are handful of those from these unis who don’t make it to their first choice for TCs, I have also seen plenty of local of graduates being stuck in the same situation too.

The point here is everyone’s career will play out differently and where you have graduated from only plays a small part. Get out of this forum and start networking. You will realise that the world is much bigger than such comparisons.