Is someone who quarrels with his father considered disobedient? What is the best deed he can offer to his deceased father who used to pray in his house and isolate himself from people? And do seeing the father in a dream in good health, or visiting his grave and reciting the Qur’an and supplicating for him, or reciting the Qur’an and performing two rak’ahs of prayer for him after Isha, reach him?

Your disagreement with your father, motivated by compassion and mercy, is not considered disobedience (ʿuqūq) as long as it does not harm him verbally or physically. Congregational prayer in the mosque is obligatory for an able man, but it is valid if performed at home, though with less reward. The deceased receives the reward of charity and supplication by consensus (ijmāʿ), while other acts are subject to scholarly disagreement. Visiting graves is a Sunnah and has its etiquette; there is no harm in supplicating for the deceased at the grave. It is permissible to dedicate the reward of supererogatory (nāfilah) prayers to the father without specifying a particular time, in order to avoid an additional innovation (bidʿah). As for dreams, we have no knowledge of their interpretation.