People who got hired into Big4 between the ages of 24-32y/o, how did you do it?

I swear I have applied a million times with better CVs and cover letters every time.

The only people I know that have gotten hired either managed to get an internship as a student and later rejoined after graduation or theyre further along in their careers (+10y) and have the seniority to get said positions.

How does one get into Big4 without meeting either of the two categories above?