What is the way to overcome despair and restore faith after losing hope in marriage, work, and housing, despite previous commitment to worship, and comparing oneself to those around them?

One must repent and return to Allah, thanking Him for His blessings, and supplicating to Him with sincerity and devotion to seek sustenance. One should look at those who have less in this world to avoid belittling Allah's blessings. Allah is the Provider, and the treasures of the heavens and the earth are in His hand; what He bestows of mercy, none can withhold. One must rely on Him and take the necessary means while entrusting all to Him, Glory be to Him. Furthermore, one must immediately repent from sins and observe prayers and acts of worship, for sin is a cause of deprivation of sustenance.