Well, if they were only interviewing you for performative box-checking reasons so they could hire the person they really wanted to hire then they would have a strong incentive to come across as somewhere you didn't want to work at. A disinterested interviewer is going to come across as not so bright. So this is hardly a fair assessment of the talent at Microsoft.

OTOH my professional interactions with Microsoft employees has always been positive. They've always been extremely capable and have gone the extra mile for me.