How can one overcome the continuous feeling of failure, sadness, despair, loneliness, not tasting the sweetness of faith, repeatedly falling into sins, and reconciling religious and academic studies, especially with parents refusing the idea of consulting a psychiatrist, along with the questioning of Allah's love and care for His servant?

Thoughts of suicide are a satanic ploy that leads to greater misery and severe torment. The pain felt in the heart from committing a sin is a sign of Allah's will for good in your heart. Falling into sin after repentance is natural for a believer, who sins and repents repeatedly, as stated in the Hadith (definition): "There is no believing servant except that he has a sin that he habitually commits... Indeed, the believer was created to be tested, repentant, forgetful; if reminded, he remembers." Do not despair or give up on repentance, for that is what Satan desires; rather, continue to seek forgiveness. Beware of being hasty in seeking results and slow in receiving answers to supplications, as this prevents their effect. Strive to be steadfast and supplicate, for Allah has promised guidance to those who strive. Be keen on the companionship of the righteous, for they are a support for you.