Stripe technical screening rejection [new grad software]

Me being an international student in US, stripe is the first company that sent a test assessment after applying to a role, and I was happy, I written the test it was pretty easy. Then after few days I

Me being an international student in US, stripe is the first company that sent a test assessment after applying to a role, and I was happy, I written the test it was pretty easy. Then after few days I got link to choose a date for technical screening, and I chose it today and after completing it I thought I rocked the interview, I enjoyed it despite being my first interview, it had two parts to solve a string based problem and I written the code in a good way too, I felt I explained it well, the approach, code modularity and all, at the end I thought I'll at least make it to

next round, but just after 6 hours I got a rejection email, I couldn't able to digest the news. I still couldn't able to understand what went wrong, just 2 days back I felt depressed that I couldn't able solve one single problem in citadel OA despite solving around 600 LC problems, and today this interview rejection, its feeling very depressed and a lot of tension because at least before leaving US (because sponsorship is nowhere favorable to us despite being having 3 more years of valid visa), I wanted to have some work experience from here. what do you suggest guys?