Automated Business Solutions interview questions

Very long and involved. I went through at least 3 full interviews and an online test. Was asked to go in for a 4th interview. With a gentlemen an an older woman, where I kid you not she fell asleep during the interview. I finished up the interview with the other interviewer. After 4 interviewers and an online assessment, I was ghosted. Never heard from them again, after the investment of time I had putting into the interview process and the way I was treated during the last interview, I felt at least a phone call saying they were going in a different direction was the least they could do