Who else actually felt sorry for Alex?

I watched the film again last night and I have to say I really did feel sorry for Alex in some respects. She did some evil things, obviously, but she was a truly disturbed mentally ill wreck who really, really needed psychiatric care and help.

I'm quite astonished that more people aren't at all sympathetic towards Alex and their sympathies are with Beth instead when Alex is probably suffering internally more than anyone else in the entire movie. It makes me realise how much mental illness really is still stigmatised.

If Dan was any decent guy at all, he would have made sure that Alex received the help she needed, which would have helped everyone else in the long run, especially after she cut her wrists which was the telltale sign, even if she hadn't intended to commit suicide, that she was seriously mentally ill. All he cared about was saving his own neck and his own marriage which HE violated by agreeing to the, what he believed, mutual one-night stand with Alex. It was all his fault, AND he went back a second time.

Does anyone else feel any sympathy for Alex at all, even a little bit?