effective world Group interview questions

Probably the worst interview I've ever had. The interviewer asked me about myself then asked if I had any questions for her. She didn't ask me a single question related to the role and then went to complain about how she had so many interviews to get through and that I might not even hear back from her after the interview. In total it was 7 minuets long and that was after I tried to stretch it out. She seemed rushed and too busy to be on the call with me. Shockingly after that amazing experience she invited me to participate in a case study to prove my skills. I did the work and then never heard back. I emailed two weeks later to follow up only to get an email a few minuets later saying they would not be continuing with my application. I expect not to hear back from most jobs I apply to but being ghosted after making it through multiple rounds of the interview process is not a good look for any company. Looking back this was clearly a scam to get free graphic design work but after months and months of job searching I was willing to give anyone a chance. Don't apply here.