I think each and everyone of us deal with being tricked/hurt/deceived in our own way. Perfect example is my husband and I, we both went through the same crap. I have and continue to have moments of pure anger and extreme bitterness usually when I see the negative effects on my children. My husband on the other hand chooses to just let it go and move on.
Yes, it is unhealthy to be angry and bitter, if I could just let it go....I would, but thats easier said the done.
We are all diffrent therefore we all feel things differently. I choose not to judge anyone on how they feel.