Good news! Obviously not separation anxiety at all!
Some dogs, for a variety of reasons, cannot tolerate being crated, but do very well loose in the house. This is why I don't agree with people automatically thinking every dog must be crated when no one is home. Brick is a perfect example!
When I brought my 2 yr old dog home, I didn't crate, but experimented leaving her alone in the house for longer and longer periods of time. With the exception of one mat in front of the door that she scratched the first time I left her, she has done no damage.
Good boy Brick!