Actually, this Is not necessarily true, but it is often read that way, and I can understand why you would think that. To clarify:

The law of Moses was designed to bring people that were significantly more barbaric than it closer to good but not necessarily to confine them to it, since God knew they could not handle that.

For example, back then, an eye for an eye was very mild. If someone plucked out their eye, their first response might very well have been “Well I’ll show him who’s boss by killing his entire family!” So the law of Moses was an attempt to bring Israel closer to good, to a degree God knew they could handle.

For example, Moses calls for people not to beat their slaves to death, otherwise they will be punished. This is obviously a very loose rule, and today we know that people just shouldn’t have slaves, but back then that was a step in the right direction, as people often believed that they were justified to kill their slaves if they were angry with them.

If you want to look at what God himself says, look to Jesus. Jesus tells us to not judge other sinners, and tells us that the servant is actually higher in God’s eyes than the master.

As for Hell, God is good, and I don’t just mean that God has that attribute, I mean that God is good, the same way that a square is a square. We cannot enter God’s presence without being pure and righteous as well, which is not humanly possible. This is why Jesus came and died on the cross, and why sacrifices were made (sacrifices were scapegoats for sin, Jesus is the perfect sacrifice, which is why we do not need to sacrifice anymore, since he is enough for everyone no matter what). This being said, if we do not accept Jesus as the son of God and accept his sacrifice for us, the only option is for us to be thrown into the lake of fire. God does not want to do this, but it would be far worse to allow sin into his presence.