Partior Software Engineer interview questions

3 Rounds of interview. Medium level question. Not Leetcode style. Mostly core java and design related. Interviewers are polite and professional. After the interview Product Development Head messaged me on Linkedin saying why did not accept the offer and wasted their time. If you must understand, its called "offer" for a reason and candidate has the right accept or decline it. If this is how they treat their prospective employee, I can imagine how current employees might be treated.