The first round was with a recruiter and was pretty basic. The second round was with a Hiring Manager, where I needed to solve a threading issue and didn't do well.

Both interviewers were super nice and ensured the interviews were conducted really well.

I didn't perform well on the technical interview. What really messed up the whole process, however, is that I still haven't received an answer from them. Usually, when a company doesn't provide feedback, that's not ideal, but not even bothering to send an email or a message saying someone was rejected is a new low. I found it disrespectful and would not apply again.

Can you solve this threading issue?