All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah and that Muhammad, sallallaahu ʻalayhi wa sallam, is His slave and Messenger.
Firstly, may Allaah reward you for your adherence to the straight path. We implore Allaah to accept your repentance, forgive your sins, and increase you in righteousness and guidance; verily, He is All-Hearing and answers whoever calls upon Him.
You have mentioned a number of sins that your wife commits, the gravest of which are neglecting the prayer and not wearing the hijab. There is no doubt that the Muslim who neglects the obligation of performing the prayer would most likely neglect other religious obligations with greater reason, as has been established in an authentic hadeeth. The first thing that we advise you to do is to be patient with her and to turn to Allaah in supplication as much as you can. Verily, Allaah is Able to rectify her affairs; so implore Him sincerely. You should also advise her kindly and wisely. If you believe that it would be more effective if another person advises her, then you can seek the help of whoever can advise her. If she accepts the advice, then that is the required result; all praise be to Allaah. However, if she persistently continues to commit such sins, then it is recommended for you to end your marriage to her, and your parents have no right to object to it, and you are not obliged to obey them in this regard. Children's obedience to their parents has limits, as underlined in fatwa 131695.
If you divorce her and your parents are upset about it, then you should strive in earning their pleasure. If you choose to be patient and keep trying to reform her, then there also is no harm in that.
For more benefit, please refer to fataawa 84501, 86044 and 83244.
Allaah knows best.