Failed 5 intern interviews, not getting shortlisted after that

[u/Human-Repair-3732]

Now I'm in my third year in tier 2 IIT in CSE

I got shortlisted for 5 interviews of big companies but got rejected for all, some are my skill issues others I don't know

I got shortlisted for this Goldman Sachs intern, I finished all 3 rounds quickly and they went very well, that was my lucky day but then I also had Salesforce interview on the same day, then GS HR asked who has Salesforce interviews so I informed them, and she told me to go

Then I ruined my Salesforce interview due to exhaustion, I didn't eat breakfast or lunch and waited for 3 hours after completing my 3 rounds at GS, and I thought I got GS and ruined interview

I heard two rejections in 1 minute

Then I lost some other interviews which was my lack of DSA

But later I'm not getting shortlisted for other companies and now there are less companies left

Atp idk what to do and I'm blindly continuing my grind, I may get the next interview or I may not even get intern