Is not striving in one’s studies considered cheating and a lack of sincerity in work? And is it obligatory to strive in them even if they do not conform to Sharia, given the impossibility of abandoning them due to the presence of usurious dealings and criticisms of the hijab within them?

If the business school teaches and encourages usury (riba), then studying there is considered cooperation in sin, and it is advisable to leave it. The slackening in acts of obedience and sluggishness in studies might be due to associating with people of disobedience. There is no obedience to a creature in disobeying the Creator. It is obligatory to accompany one's parents with kindness and beneficence, even if they refuse (the suggestion to leave the school), while also obliging oneself to follow the path of those who turn to Allah in repentance. It is advised to enroll in a college that teaches Sharia.