I think it's worse when it goes the other way...when you want 2 doubles and all they have are kings (traveling with a friend, etc.)

Married 42 years we don't care what they give us, and often use that to our advantage ("so sorry, the king you booked won't be ready for 6 more hours, all we have are 2 doubles..." "Great! we'll take it")

We recently got upgraded to a 2 bedroom suite at an ES, so a total of 3 beds, and we slept in all of them during our stay - I felt like Goldilocks finding the bed that was "just right".

But doesn't excuse the attitude you received.