Avalara interview questions

The on site interview was a marathon of too many people and too many whiteboard exercises. After three and a half hours, in my fifth group of interviewers, I was treated to a forceful line of questioning by a developer that bordered on inappropriate. I made it clear I was uncomfortable with the line of questioning and he persisted anyway. It was disrespectful and offensive. At that point I was exhausted and declined to do the last whiteboard exercise and withdrew myself from consideration. While there were a few things regarding team structure and management that raised flags and influenced my decision, my interaction with this person was the tipping point. I have never been treated in such an unfriendly and disrespectful manner in an interview before.