Teradata interview questions

I applied and heard nothing for two months. I was called out the blue, I had forgotten I had applied so didn't understand who was calling. A brief discussion with a recruiter, followed by 5 video conferences with hiring manager, person being replaced and various VP's. After this Teradata ghosted me. I never heard another word from them. Extremely rude and unprofessional. I expected more, after a considerable investment of my time in preparing for and participating in the interviews. This happened to me before with Teradata, a couple of years ago, so it's not one lazy recruiter, it's corporate policy. I don't appreciate this and will never consider Teradata in future job hunts, I should have learned my lesson the first time.