The problem of pain and suffering and injustice in the world is likely one of the biggest problems for a lotta people when it comes to having and maintaining faith in God.
A lotta people have stepped back from God, not necessarily into atheism, but a lotta people have stepped back from God because of their inability to reconcile a good and loving God with the pain and suffering and injustice in the world ~ maybe more so than for any other reason.
''The Lord is good to all: and his tender mercies are over all his works.'' - Psalm 145:9
Contradicts;
''Shall a trumpet be blown in the city, and the people not be afraid? shall there be evil in a city, and the LORD hath not done it?" - (Amos 3:6, KJV)
"The Lord shall go forth as a mighty man, He shall stir up jealousy like a man of war: He shall cry, yea roar; He shall prevail against His enemies". - Isaiah 42:13
This version of God is far from being 'good to all,' with no evidence of 'tender mercies all over His works.'