I'm aware of Dispensationalism, if that's what you're describing.
Dispensationalism is itself a very loaded theological term. Much like current US politics, where you can't even introduce a bill that only addresses a reasonable issue, it has to have all sorts of unrelated stuff tacked onto it, most of which nobody ever takes the time to even read
So in the very simplistic sense of the word, yes I did say G-d tells us He deals with people in differing "dispensations." I just feel the need to qualify that as not being connected to the relevant "ism."
Yes, maybe God deals with humanity differently in different "seasons", but then doesn't this make God somewhat schizophrenic (for want of a better word)? Why would God need two plans anyway (Law and Grace)?
So in general, the world was not a better place after God gave the Law.
it probably would have been better if God had just skipped to Jesus straight away.
From
our perspective? Yes, certainly! And yet this will tie into what Drich has been saying, that God is God and we are not. He seems big on us getting that idea, and accepting the difference.
And yet the world existing for however long before Jesus' Incarnation, subjected mankind to Hope. And today, we are still subject to Hope. This is an important connection ...
The world is a better place after the giving of the Law, for a couple very important reasons you're not looking at:
1. From a purely practical standpoint, Christ came from Israel. The Law preserved Israel's physical existence, just long enough for Messiah to arrive. Then, poof! No more national Israel. (What the significance of the modern reiteration of Israel may or may not be is still interesting)
2. The Law advanced God's Covenant with man. It was step 3, with the flood being step 2, clothes made for Adam and Eve instituting sacrifice being step 1, and Grace via the Gospel being step 4. An interesting way of looking at "the 4 corners of the world," if you will. (Not geographically, but time-wise, relative to human history) This can also help you see Spiritual application to all of this, w/o needing to be hung up on past history. The prior 3 steps do indeed help us to fathom what the Gospel does and does not say. And in this way, being in Christ can be seen as "fulfilling the Law."
I know what's right and wrong in my mind aside from Moses' Law, in fact, despite Moses' Law.
Please notice that my above version of the benefits of the Law do NOT include teaching us right from wrong. And the fact that globally, people know
the practical components of the 10 commandments even apart from any Judeo-Christian tradition, speaks to me of the reality of God. Apart from the Law
we can pretty much ignore everything from Genesis to Joshua with respect that these things did not happen literally or historically. They're just stories written by zealous Priests who wanted to record their own version of how Israel came to be and what the Israelites needed to do to please their God.
Many Christians ignore much more of the OT than that. They also miss the richness of the Gospel, and at least some of the subsequent Life in Christ, but can still be saved. Even so, I still encourage you to focus on the Gospels which you say you're doing, leave off the OT for a while at least, and if you maintain that Gen - Judges is myth with moral, that will not hamper Faith in any way.