First round - online coding assessment second round- technical interview round on oops concept, recursive fun session, logic building, coding practices, understanding requirements , pointer , scope HR interview - general questions

I had the initial phone call with the recruiter. The phone call lasted about 20 minutes where we talked about my skills and experiences and the interview process. Nice conversation. Recruiter asked me to email my availability for the next round of interviews and I emailed him within an hour. A week went by where I didn’t hear back so I sent another email to follow up. The recruiter responded a couple days later and said they had been busy and asked me to send additional availability for the next week. None of my available times worked for them so he asked if I could do a call over my lunch break. I agreed to do the phone call over lunch but I never heard back. It was a very unprofessional and negative experience.