It would be better for you if she gets citizenship because then your responsibility stops.
From the stand point of getting citizenship if she had fraud in mind from day one then yes, not fair but there is nothing you can do now.
The government is not responsible for you chosing someone who acts like she does....what policy do you want changed ?
Jumping into a relationship and ignoring flags is something you have to be accountable for yourself and live with the consequences.
People can be very 2 faced but there are always signs that are ignored. She may have really loved you but fell out of love. It happens.
You can't just assume she defrauded you because she wants to end the marriage.
She got her GC a year ago and just a wek ago said she wants out.
I see no behavior description in your post pointing to obvious fraud.
1. yes - once you have the receipts on the filing - you begin a new period of authorized stay. in the end - when EAD or greencard issued - you can join in with USA society - get a SSN - start working...
2. see #1.
