D.R. Horton Purchasing Agent interview questions

Applied & Received a call from HR. JD was a perfect fit for my past experience. 1) HR pre-screen call 30 mins 2) Department manager phone call 1hr plus 3) In Person @ HQ office conversation 1 hr. Finally, 30 days later I received an automated email rejection from a HR account with zero personalization. After my time spent and 3 interviews a bit more respect and kindness would have been more professional when sending a "status" update. Manager was rude and inappropriate.