I did two behavioral interviews with different team members. The final round consisted of a case study which I presented live to a panel of interviewers. Half the interviewers didn't show up and the other half showed up late. I got interrupted with questions during my presentation even though there was a Q&A scheduled for the last 10 minutes. After the interviews were done, I received no feedback and no rejection even, they just ghosted. It was extremely unprofessional and an absolute waste of time. I've done many interviews with many startups and this was the worst one. They clearly have no idea what they're doing.