Praise be to Allah.
Allaah has commanded us to treat our parents well, and He has linked this to the command to worship Him and the prohibition of associating anything in worship with Him. The rights of the mother in this regard have been emphasized more than those of the father.
Allaah says (interpretation of the meaning): Worship none but Allaah (Alone) and be dutiful and good to parents [al-Baqarah 2:83]. Ibn Abbaas said: This means treating them with respect and kindness, and lowering the wing of humility to them, not answering them harshly or glaring at them, not raising one's voice to them, but being as humble towards them as a slave towards his master. Allaah says (interpretation of the meaning): And your Lord has decreed that you worship none but Him, and that you be dutiful to your parents. If one of them or both of them attain old age in your life, say not to them a word of disrespect, not shout at them, but address them in terms of honour. And lower unto them the wing of submission and humility through mercy, and say: My Lord! Bestow on them Your Mercy as they did bring me up when I was small. [al-Isra 17:23-24]. Al-Baghawi (may Allaah have mercy on him) said: This means not saying anything that may contain the slightest hint of irritation. [The word uff in the aayah, translated here as a word of disrepect] comes from the word aff, which is similar to the word taff; both words refer to the dirt that collects under fingernails, and [in Arabic] when one is annoyed and fed up with something, one says uff! to it.
Abu Baddaah al-Tajeebi said: I said to Saeed ibn al-Musayyab: I understood everything in the Quraan about respecting ones parents, apart from the aayah (interpretation of the meaning) But address them in terms of honour [al-Isra 17:23]. What are these terms of honour [al-qawl al-kareem]? Ibn al-Musayyab said: It is the way in which a slave who has done wrong approaches a harsh and strict master.
The obligation of treating ones parents with kindness and respect is not confined only to Muslim parents; they should be honoured in this way even if they are kaafirs. Allaah says (interpretation of the meaning): And We have enjoined on man (to be dutiful and good) to his parents. His mother bore him in weakness and hardship upon weakness and hardship, and his weaning is in two years give thanks to Me and to your parents, - unto Me is the final destination. But if they (both) strive with you to make you join in worship with Me others of which you have no knowledge, then obey them not, but behave with them in the world kindly, and follow the path of him who turns to me in repentance and in obedience. Then to Me will be your return, and I shall tell you what you used to do. [Luqmaan 31:14-15].
If Allaah has told us to treat even these parents with respect and kindness, in spite of the heinous sin which they are telling their child to commit, which is the crime of associating something in worship with Allaah, then what do you think is the case with Muslim parents, especially if they are righteous? By Allaah, their rights are among the most important and most certain rights, and fulfilling these rights in a proper manner is one of the most difficult and most important duties. The one who is guided to do this is truly guided, and the one who is not helped to do this is truly deprived. Innumerable ahaadeeth also confirm this. According to a hadeeth narrated by Abu Hurayrah (may Allaah be pleased with him): A man came to the Prophet (peace and blessings of Allaah be upon him) and said: O Messenger of Allaah, who among the people is most deserving of my good companionship? He said, Your mother. He asked, Then whom? He said, Your mother. He asked, Then whom? He said, Your mother. He asked, Then whom? He said, Then your father.(Reported by al-Bukhaari, 4/13, and Muslim, 2548).
Makhool said: Respecting ones parents is an expiation for major sins.
You have to be patient with your mother and put up with the harsh treatment on her part, which is upsetting you. By treating her with respect and dealing with her kindly, you will earn her good pleasure and love. Try to avoid things that will provoke her and make her angry, even if they are in your interests, without causing harm to yourself. Your mother, for her part, has to treat you well and stop harming you with her blows and insults.
With regard to what you mention about her praying against you, if these duaas are said for no good reason, they will not be accepted. It is not permissible for her to pray against you for no good reason, because of the general applicability of the Prophets words: [The prayers] of any of you will be answered, so long as he does not pray for sin or the breaking of family ties. This hadeeth indicates that if a duaa includes sin, it will definitely not be answered. There is no doubt that praying against ones child for no good reason is a sin.
We ask Allaah to help you to treat her with respect and earn her pleasure, and to help us all to do that which He loves and will please Him. May Allaah bless our Prophet Muhammad.