SAP Developer Senior interview questions

I was asked to explain the work I had done in my previous job which was related to the position. The interview also involved a code review question and a coding question.

There are 5 rounds 1-1 interviews. 4 algorithm white board question, one project you did related questions and behavior questions. The interviewers are very unprofessional. I wrote the algorithm on the white board, but the ridiculous is that one interviewer didn't understand your solution at all even with explanation. Another one did not exactly understand the answer, and insisted that the answer is not right. I am so disappointed at the interview experience at SAP Palo Alto. Even they gave me offer, I would reject it. The reason I don't want to work with this kind of team members that are not nice, not capable and not professional.