Is this movie being sarcastic? *mild spoilers, nothing that should ruin*

SOME MILD SPOILERS BELOW

This is a legitimate question. All the reviews seem to say that this movie is a testament to love, sacrifice and selflessness. But I found it to be the opposite and was wondering if the movie was deliberately taking a jab at peoples' concept of love. A satire that audiences fail to get.

Here are a few examples (I'll avoid the big one which comes at the end of the movie in case anyone reading has not yet seen it)

1. In the beginning the woman breaks up her marriage and devastates her family, or at least her son whom we see later has developed deep emotional problems, all in the name of love. She has fallen in love with a new man, so that excuses her illicit affair and her dismissive treatment of her husband and children. Selfish love conquers responsible love.

2. The woman makes her new lover swear that he will never abandon her. Then she later accuses him of "abandoning" her because he develops Alzheimer's and starts to forget. Again this is a somewhat irrational definition of love on her part. He didn't abandon her; he is suffering through an incurable disease. I think that dialog really cuts to the core of how she manipulates the concept of love to suit her own interest.

3. There is a very disturbing scene where she is furious with him for breaking her violin and, maliciously, she shatters his illusion of security by telling him the brutal truth that has been considerately hidden from him. We, the audience, can see that she is viciously lashing out at him; yet she justifies herself by saying they swore to each other that they would be honest. Why suddenly at that moment in the middle of a fight, in emotional rage, does she decide to be "honest"? It's just another justification for her cruelty.

4. The end of the movie (which I won't describe) is played sentimentally, but if you think of her actions, you might agree that she is taking the selfish and easy way out, again all in the name of "love".

At first I hated this film for these flaws, but then it occurred to me that maybe the director was deliberately showing us how self-righteous "love" can be used to justify selfish behavior? If that's the case, then this is a brilliant satire, so subtle that very few people get it. But I don't know, I tend to think that's not the case, and that the filmmakers were trying to tell a love story which failed on a logical level and, in fact, seemed to be the antithesis of "true love". If you'd like to see a remarkable telling of true love in light of alzheimers, please, please check out "Away from Her" with Julie Christie.

I'm interested in knowing your opinions whether you agree or not, particularly how the woman's actions in the above 4 points can be seen as selfless or caring for anyone other than herself. Or does everyone just excuse her actions because "she's in love"?