The biggest sticking point is usually "everyone came from 2 people", but that is entirely possible as long as they aren't the only two people in existence.
if they aren't the only two people in existence, then it is not true that everyone came from them. All those other people around at the time didn't come from them. It is possible that everyone alive today came from two people, but not possible that everyone ever did.
If mankind is 'everyone descended from Adam and Whatsherface'. then Adam is the first of mankind.
what other options are there? what definition of mankind could rescue the quran?
I have seen many ex-Muslims tell their stories on forums about how looking into evolution led to their eventual apostasy.
i would also like to take issue with your claim that these is such a thing as an ex Muslim. I don't know hoa many shekels you are getting paid to make such a claim, but there are only ex christians, hindus, ex jews, and ex shias. There are no ex Muslims.