yeah I hear you ... I've been rejected for stupid shit many times

I applied to a similar platform, maybe same, first question was to do linear regression just with linear algebra, I couldn't remember all the details to save my life, got maybe 20% there. second question was, here's a random data set, do the eda and model, and I crushed it with 10 minutes to spare, they said almost no one finished it. because a bank had asked me similar stuff and it was a little shaky so I practiced every day for a week or two. the bank also asked me some bullshit dynamic programming leetcode stuff that I hand-waved through and that's prob why they rejected me, it was pretty silly.

the tough love: interviewing is ALWAYS a signaling problem that doesn't line up perfectly with the job. the onus is on you to solve for the test. maybe it's an arbitrary test but if you hack it you show you have the desire and focus and ability to get something arbitrary done. the good news is, if the top candidates know dropna() off the top of their head, if you practice for a week, so will you. there's a time to vent a little and then the time to do da 'ting dat de doctor ordered.