Upstart Quality Assurance Associate interview questions

A total of 3 weeks of interviewing with recruitment, quality assurance team, compliance, learning and development, operations and references check. Each interview was about 30 minutes with each person. A majorities of the time, questions were scenario. Time was left for the candidate to ask questions.

I went through the entire interview process and when I got to the offer stage, the recruiter informed me that the salary for this position was lower than what they presented- more than 16% lower. One of the most unprofessional interviews i've been a part of and since then, i've recommended that no interview here- they clearly don't know what they're doing.