Walmart Global Tech Data Analyst 3 interview questions

I appeared for Walmart Interview twice. The HR called me and they wanted to setup all the rounds in one day. Upon requesting for atleast a day they were like we really need to setup the interview asap and they sceduled all the 3 rounds (1 hour each) in one day. I was so so tired by the end of the day but I was glad that my interview went good.They did not call me back. Upon calling the HR she told me she will get back but I heard nothing from them. After 3 months I again got a call from Walmart for another role and they scheduled the interview. I had 2 rounds both technical and even with the hiring manager and my interview went so so well that I was sure I will receive a call. But unfortunately the HR did not call me back. Upon asking them she said she hasn't received the feedback yet from US team and they havent gotten back to her whether they need a resource for this opening or not. I mean guys seriously why do you waste people's time.