You owe your lives to your Creator, and each and every sin you have committed is a moment you have stolen from Him. You can never get those moments back, so you can never pay the debt you owe Him. As long as you continue to try to earn His favor, you are guaranteed to fail.
But there is hope.
God Himself has provided a solution -- a way you can actually be right with Him. And it appears to me that the Qur'an itself points the way.
When the Qur'an was written, it claimed that:
A. the current Christian scriptures were true (Quran 2:40-44; 3:93; 5:43-48; 5:68; 7:157; 10:94; 20:133; 26:196-197; 29:46; 53:36);
B. the teachings of Moses, Abraham, and Jesus are true (Quran 3:84; 5:43-48; 42:13; 53:36);
C. Muslims and Christians worship the same God (Quran 29:46).
Indeed, according to the Qur'an, the Christian scriptures that were contemporary with it ought to be used to test the revelations given to Muhammad to see if they are genuinely from God (Quran 10:94).
Note that when these claims were made in the Qur'an (c. 600):
C. the God worshipped by the Christians was Trinitarian including the divine Son, Jesus (Isaiah 9:6, 48:16-17; Matthew 1:23, 3:16-17; John 1; Luke 9:35, 20:44; Acts 3:13; Psalm 110:1; Colossians 1:16, 2:9; Romans 15:16; 2 Corinthians 13:14; Nicene Creed c. 431);
B. Jesus had taught that God is Trinity (Matthew 28:18-20; John 14:9, 14:16-17, 14:26, 16:13), Jesus is divine (Matthew 28:18; Luke 19:38-40; John 8:58-59, 10:30-33, 14:6-7), and all men sin (Mark 10:18; Luke 11:13, 18:19);
A. the Christian scriptures (undebatably established since c. 397 in the west and c. 508 in the east, unchanged for 100 years prior to the Qur'an) taught that God is Trinity (Isaiah 9:6, 48:16-17; Matthew 1:23, 3:16-17; John 1; Luke 9:35, 20:44; Acts 13:13; Psalm 110:1; Colossians 1:16, 2:9; Romans 15:16; 2 Corinthians 13:14; Matthew 28:18-20; John 14:9, 14:16-17, 14:26, 16:13, etc), Jesus is divine (Matthew 28:18; Luke 19:38-40; John 8:58-59, 10:30-33, 14:6-7, etc), and all men sin as a direct result of Adam (Luke 11:13; Romans 5:12-21; 1 Corinthians 15:22, etc).
Islam denies the Trinity, the deity of Christ, and that all men sin as a direct result of Adam. The Qur'an also denies that Jesus was crucified (Quran 4:157), whereas the Christian scriptures that the Qur'an says are true claim that Jesus was crucified (Matthew 27:35, 28:5; Mark 15:24-25, 16:6; Luke 23:33; John 19:18).
From all of this we see that:
Premise 1: If the Qur'an is true, the Christian scriptures are true.
Premise 2: If the Christian scriptures are true, Islam is false.
Conclusion: If the Qur'an is true, Islam is false.
Christianity, on the other hand, does not assert that if it is true, then it is false; in fact, if Christianity is true, then Christianity is true. It is the only worldview that can properly make that claim.
In Christianity, which the Qur'an declares to be true, we see that the divine Son, Jesus, (who, because He is uncreated, owed His life to no one) gave His life sacrificially in your place to your Creator to pay the price for your sins (Philippians 2:6-8; Colossians 2:14)! He did this so that, if we put our trust in Him, our sins would not be charged against us (Psalm 32:2; Romans 4:8).
Through Jesus the Christ, the Son of God, your Creator has offered you forgiveness for your crimes and disobedience against Him (Luke 5:24; 1 John 1:9; Acts 13:38). If you turn away from your sins and turn toward Christ, asking for God's forgiveness, you too can receive the forgiveness of God Himself (Acts 2:21, 4:12, 16:31; Romans 10:9, 10:13), and avoid the wrath to come.
The alternative will not be pleasant (Revelation 14:11, 20:15, 21:8; Luke 12:46, 13:28; 1 Corinthians 6:9-10; Mark 9:47-48).