Being late for the theatre makes you a jerk. Even if you had to deal with the Santa Claus parade and the sinkhole downtown. Because these things were kind of a surprise, weren't they?
Complaining when I don't let you into the theatre because the play has started makes you an asshole, in addition to being a jerk. Complaining also doesn't get you in. It just annoys me, which sort of amplifies your assholiness.
Demanding a refund because you were late and I didn't let you in makes you a cheap asshole. Especially at a theatre like this one, where the actors are being paid shit, the director is being paid squat, and the stage manager is being paid bupkis. And the house is only getting 4% of ticket sales.