Are you reading LN? In the LN Kirito and Asuna are well shown developing personalities and their histories. Kirito distanced himself from people and his family when he learned at the age of 10 that Suguha was his adoptive parents and that they were also his uncle and aunt. Kirito is traumatized by the death game prison because he killed people in the game and saw death. Asuna comes from a wealthy family, Asuna must obey her parents and cannot dissuade her parents, especially her mother. Which parents will choose her husband, e.g. the father chose Sugou for her daughter. The mother wanted to transfer her daughter to another school and at first forbade Asuna from meeting Kirito because he comes from a middle-class society.I mean, putting aside Fujino's game (which I actually have no complains about at all, not sure why are there so much hate), Kirito and Asuna didn't have much personality even in the original LN/Anime either to be honest
At the end of the Mother's Rosiaro arc, Kyoko finally accepted Kirito, Asuna's boyfriend, and even in the Ordinal Scale movie, a scene at the end is shown. As Asuna and Kirito return home, Kirito greets Asuna's mother
I have 22 volumes of SAO and 3 volumes of SAO Progressive