ADP Account Executive interview questions

While I was in my last semester of college (and extremely busy working to put myself through school, as well as balancing internships and my final classes), I interviewed for ADP. My initial interview with the HR Coordinator was lovely, however each interview after became increasingly time consuming. I ended up having 4 interviews with various team members (excluding my initial interview) where I was requested to send thorough thank-you e-mails before/after (with in depth notes of my takeaways). Unfortunately, I ended up getting completely ghosted after my last interview and never heard a word back, which was quite inconsiderate considering I had invested well over 5 hours into their interview process. While I’ve heard great things about working for the company, I really hope this isn’t a pattern for how the regard employee candidates, particularly college students and recent graduates.