It is difficult for people to understand this, if they don’t have a child or themselves a diagnosis such as generalized anxiety disorder or social anxiety disorder and/or clinical depression. Those who say, why don’t I get help too? I need my alone time too? - Absolutely, have at it. You are free to do as I and others in this type of situation did: spend months and years trying to figure out why someone who has a good intellect is suffering and unproductive, including a battery of tests; psychiatry appointments (many); trying various types of medication over months to years; hospitalization in some cases, including our family; and other expensive, time-consuming, and worrisome interventions. No one is denying you your right to obtain a diagnosis for you or your child, so either put shoe to pavement and try to get one, or check your resentment at the door.
OP good luck to you and your daughter. You’ve gotten some good suggestions on this thread.
P.S. The roommate’s behavior - banging around the apartment, muttering under her breath - is called passive aggression.