My family was middle class (stay at home mom- was a teacher before having kids -and my dad worked for a regional phone company before being bought out by a large bell), attended public school, and I went to Columbia. None of my friends were rich (well, maybe one was upper middle class). Others came from families of teachers and various other lower paying professions. 3 had Pell grants. I went into business and basically had one offer for a job and have parlayed that into a pretty successful career. I had not connections. Going to CU helped me get an interview for sure (because my industry recruits at Ivies), but that was it.
Nome of my friends as an adult are from Ivies and they’re all successful. And no one really bashes anyone else. Can be successful, rich, poor, connected, not connected, etc. no matter where you go.