Obviously, you didn't get much out of your study.
(Sigh.)
This is really a bit tangential, but --
"So you must be perfect, just as your Father in heaven is perfect." - Matthew 5:48
"There is no one who always does what is right, not even one." - Psalm 14
"But God has a way to make people right with him without the law, and he has now shown us that way which the law and the prophets told us about. God makes people right with himself through their faith in Jesus Christ. This is true for all who believe in Christ, because all people are the same: Everyone has sinned and fallen short of God's glorious standard, and all need to be made right with God by his grace, which is a free gift. They need to be made free from sin through Jesus Christ." - Romans 3:21-24
The standard of behavior within Christianity flows from this. It is impossible, through self-discipline, to live up to the standard set by God. Everyone is sinful, everyone has been condemned to perpetual torture. Only through God's grace and forgiveness through faith in Jesus Christ is there any hope of redemption.
This is not anything obscure. It's taught in the Catholic Church and all mainstream and major Evangelical Protestant churches. When you say that God expects only that people do their best, you are either referring to a reasonable expectation
for Christians and not for all mankind (whereas I was referring to the latter), or you are presenting your own views outside of standard Christian doctrine.
God, according to traditional Christian theology, condemns most of mankind to scream forever in horrible torture. He gives Christians a pass, although (according to some sects) not even all of them. In any case, most people aren't Christians, and so are condemned to eternal suffering.
These are the acts of a monstrous, evil, bloodthirsty tyrant -- and that is how traditional Christian theology sees God. That he offers forgiveness to those relatively few who will worship Christ does not make him a loving God.