I don't normally read the spoilers before I do my own review but I did this time Ammi because
Spoiler:
Like you I was kind of agitated after the movie ended

I spent most of the 2nd half of the movie thinking "hang on a second, are they trying to make us root for that asshole who abuses the elderly? what the **** is going on here?" and then I was thinking that bitch is going to get away with it. I was glad she got shot in the end however the "abuse the elderly" empire was already built and someone else will just take over plus the poor guy that shot her will end up in jail for the rest of his life, the Judge never got told that he was wrong to believe Marla over patients families and the horrific scam was never uncovered, so yeah Marla got her "comeuppance" but what about all the elderly people still imprisoned?
I mean saying all that it was a good movie

but it was a pretty unsatisfactory end, I felt robbed of proper justice!