a bit overrated

Rating: 7/10 (17 June 2015)

i didn't read the book, i watched this for Rosamund Pike who, i think, is a extraordinary talented British actress.
until the end, this movie is outstanding, R.Pike gives a superb performance as a psychotic and paranoid woman, B.Affleck as her husband is great as all the cast.
one day she disappears, after a few weeks, the cops start to think that probably the husband is the ''MAN'', this stand for almost half the movie, when we start to see what really happened, Amy is Machiavellian, no one notices so far, but she had organized everything to send her husband in jail for a death sentence, she's living in a motel until 2 morons steal all her money. She will, then, ask her 1st lover to give her shelter and then start a new scenario to go back home.. BUT the end is:
what are they doing!?
OK she comes home, after killing Collings (N.patrick Harris) , she is literally painted with blood, saying ''he'' was trying to rape and murder her; well, OK, but then, nobody will even clean her face whatsoever at the hospital, may be she has been hurt right? so the 1st thing they must do is, look for wound or else while she is on the bed but no...,
Now she is there, in a wheelchair (still painted with blood) answering questions from the police, the woman, in charge of her case, who suspect she lied, can't talk or ask anything even months after.
oh!, alright then, see, B. Affleck is doomed, he is forced to live with her, saying, ''ok, we are a good couple now, no problem'' instead of putting his wife on Shutter island.
it's like they wrote an end quickly to make a longer movie than it should be, luckily, it's in the last minutes of it, so the disappointment isn't that high, but for me, the movie ended when she arrived home
In any kind of movie, actors can deliver great performance, R. Pike (Amy) deserves an Oscar for this.
What should have been one 10/10 is not more than 7/10