I'm going to give Alex some leeway of the girl thing - he's always had some social issues and I think that the relationship is somewhat unilateral in that she's the main player in many ways. That said, yeah, he's in there too, but I did find him candid about his lack of commitment and I agreed with him when he was puzzled that she didn't seem to understand him.
Omg, yeah, she lowered him off the end of the rope! Holy hell! But, that's Alex's fault. He's climbing with a rookie and he should have checked and double checked everything. Either she should have either been tied in with the rope then cloved to an anchor, the rope tied directly to an anchor, or at the very least, the end knotted. That's basic rope handling, and while its a basic skill, you should always check.
Alex was angry, yup, but damn dude, why didn't you ensure things were proper before leading up?