I had two significant tech interviews in my job hunt.
The second was a code review of the takehome they'd given me some days back. I took notes while they tore my code apart - in a nice way, but they still tore it apart lol. That night I took time to incorporate all their feedback into my code, and I actually felt myself become a better programmer in the process. That company actually suspended the hiring process for that position due to budget constraints.
Just like others have said: the only helpful reaction to a failed tech interview is to learn and grow from it. Now are tears and frustration and a deep-dive into caramel icecream (my personal favorite) necessary? Yeah sure sometimes (ok all the time!), but not helpful. There's nothing that cannot be learned - so focus on learning and the rest will always be worked out.
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