What is the way to overcome the despair and extreme distress that have afflicted me after I lost the ability to memorize the Qur'an, stopped teaching it, and forgot what I had memorized, which led me to hate life and wish for death?

Allah the Almighty is the Deliverer (Al-Mugheeth) who answers the call of the supplicant and removes evil. He is the Rescuer from hardships and tribulations for all creatures. One should not despair of Allah's mercy; rather, one should seek His help and resort to Him, and supplicate frequently, humbly entreating Him, and seeking His forgiveness, and be patient in the face of trials, for Allah's relief is near. Reflecting on Allah's words and His Most Beautiful Names opens doors to goodness and increases faith.