Commvault Support Engineer interview questions

I applied for the Customer Support Engineer (server) role and was contacted a couple of weeks later by a recruiter to setup an interview. We settled on a date and time for them to call me. The time and date came and went; and, approximately 30 minutes after the call was supposed to have happened I emailed the recruiter to follow up since they never called me. I never received a reply email and 5 days after that I received a form email that they were no longer interested in me as a candidate. I’m going to be honest, treating applicants as expendable like that is a red flag for me from an employer because I have never seen an employer treat applicants as expendable that didn’t also treat employees as expendable.