Airbnb Engineering Manager interview questions

Had two coding challenges over the phone, on two different days. After the first did well enough to move onto the second. Felt I smoked the second one with a very efficient solution that was correctly working. Was then told I didn't have enough experience for the position. That's perfectly fine and I'm not upset about that. However, I'm giving this a negative rating because they didn't need to waste my time on the coding questions in that case- they already had my resume.