athenahealth Sr. Software Engineer interview questions

First I was asked to introduce myself then asked about my projects then the interviewer asked me to open up the VS code editor and asked me to code on one array related problem after that he asked few JS snippets.

I was approached by a recruiter in athenahealth. Initially there was a screening call, after that there were 3 technical rounds. Technical rounds were easy to medium, DS and Algorithm questions. Third technical round was with a manager mostly discussed about work experience. After that I got a mail that I have cleared all the rounds and they requested me to send my personal details, previous salary slips, passport photo and everything. I sent them all the details. It's the end. They ghosted. No info after that. I tried checking for status update, no response. Atleast they could respond properly and give feedback. Why waste time of both interviewers and candidates?