Align Technology interview questions

HR screening, 30 min with hiring manager. Have a panel interviews with multiple people from different department. All the process is smooth and pleasant until the last round. The interviewer is very arragant and had no interestes in learning my experience but ask irrelevant questions about my education which is very uncomfortable to me. If my education is questionable to you, why waste our time going through the whole process until the last round of the interview?

first was a phone screening interview and followed by a second round interview with the hiring manager. very straightforward. my interview process took an additional round due to scheduling conflicts between two hiring managers, so i had three total.