It was a bit intense the ending, yeah.
I was sad for Bo's character (Ryan). It's difficult to blame him when we don't know exactly what happened, but I guess he was to blame if he was there watching someone drunk getting sexed.
**(Spoilers below)**
Yes, the last hour took a completely unexpected turn and I loved the ending too. And the song Angel in the Morning hit just right. I think the director said they would frame Cassie in a few shots to make her look like an angel with wings, when she is sitting at her bed. She would be a sort of avenging angel.
And always great to hear police sirens arrive to catch the villains and have them get what's coming.