Nuclein interview questions

A recruiting company reached out to me and put me in touch with the Chief People Officer of the company. I had a 30-minute interview, and he scheduled a second interview with the COO of the company. The COO did not appear for our online meeting, and I emailed the interviewer to reschedule. We rescheduled and had the second interview. During this interview, I walked the interviewer through my past working experience in the medical device industry. The interviewer said, 'I am very impressed, and I will schedule a visit with the team so you can better get to know our product.' After that second interview, the COO never got back to me. I emailed the CPO and COO and even gave them a call because I know the startup life is very busy, and sometimes these types of things fall through the cracks; however, they never got back to me. This kind of behavior makes the company looks unprofessional and disrespectful.

Several phone interviews, mild technical review, wanted everyone onsite 'because.' Received no response from the company after the 3rd round and they did not respond to an email follow up to ask of next steps.