Rejected by almost all firms, don't know what to do
I just received my rejection from Big D and the third and. I'm just numb. So far I've been rejected by OW, MBB, D, and LEK. I graduated from my undergrad with a pre-med-esque degree last year and decided I did not want to become a doctor and fell in love with consulting. I have a pretty decent GPA (3.5-3.6) from a good STEM school and really good leadership/extracurriculars + prestigious scholarships and am attending a top MSF/MiM program on the East Coast for the sole reason of gunning for MBB/top consulting firms.
I did everything I could. Applied and got into one of the best masters programs, networked with over 100 people at all the firms, had partners refer me, had partners mentor me, bought all the books, videos, and did over 150 cases. I've had consultants from MBB tell me during practice cases that I am really good during cases (one even said that he blocked out 30 mins for a case and I did it in 15). Yet I couldn't even get past the games/resume screens at MB and the finally B destroyed me with an interviewer who seemed like he was about to pass out from exhaustion and that stupid Casey chat bot thing.
I've handled a lot of things in my life, from coming to this country as an immigrant kid, to having brain surgery. But this hit me really hard. I put everything I had for the last 12 months into this. And now I have nothing but a trail of rejections and thousands of dollars of debt from the program.
I'm 25 years old with no idea on what to do next. I feel like I am already too old for entry level positions, particularly with I-banks (considered joining because I'm really good at finance and modelling, but again, age and not internship :( ).
Sorry for the rant and sorry if what I said feels all over the place. I'm just numb and defeated and I don't know what to do.