Your conclusion simply doesn’t follow. Freedom doesn’t “cause” us to do evil and neither does it make God “morally responsible” for our choices, not even “at least a little bit.” You don’t understand freedom which is why you look to “blame” God for free acts.
Everyone who commits sin – i.e., commits evil and thereby separate their very self from God and from freedom – makes themself into a slave of sin and “at least a little bit” unfree.
Whatever point “Oldcelt, Bradski, Pallas Athene, that dude who started the thread about Molinism, many others,” including yourself, have “been hammering away” at for “many months” doesn’t lead to where you all suppose it does.
sigh I thought for a moment we had made some progress! I am actually disappointed. This isn’t sarcasm; I am seriously disappointed.

Because I enjoy explaining this, I’m going to try one more time, though this is off topic. Let’s try talking about mortgages so we can understand the word “underwritten” a little bit better.
What does it mean when a mortgage is “underwritten?” It means that a person with lots of money has decided to actually “fund” the loan. The flow of money looks like this:
Underwriter------Lending Institution------Consumer (or Business)
The consumer needs to money to buy a house. So, they ask for money from the lending institution. Often, the lending institution will want to secure an “underwriter” who will purchase the loan long-term from the lending institution, so the lending institution can turn around and use the money to originate more loans. So, the lending institution gets the money from the “underwriter.” Those “underwriters” hold the loans with the hope that the interest earned over time will be worth and
while assuming the risk they will default.
Let’s draw a parallel with our “freedom.” The flow of freedom looks like this:
God-----------Our ancestors---------------Us
We need existence to be able to exercise freedom. So, we get existence from our parents. Always, our parents get their existence from their parents, and so on all the way back. However, the existence itself has to come from somewhere or something, so we say it comes from God. God holds our existence with the absolute certainty of how it will turn out. He takes no risks and isn’t surprised at the outcome.
So, if a loan defaults…the underwriters are
rightfully blamed by the board, CEO, shareholders, etc of the underwriting institution (and this is without perfect knowledge of everything). Sure, underwriters don’t often get fired for funding one bad loan, but a record of consistent poor judgment will cost one a job.
So, if a person becomes heinously evil, God is
rightfully blamed (at least to some degree) by everyone affected by the evil person. Is it
all God’s fault? Of course not! There is plenty of blame to go around, but it doesn’t make sense to think God has no share in it whatsoever.
Is the bad loan totally the fault of the underwriter? Of course not! We can lay blame at the feet of many people: a bum economy, lazy homeowners, sudden death, unforeseen healthcare costs, etc.
So, when you said our freedom is “underwritten” by God, can you see how I was excited at the idea of potential “common ground” here?
Now, by your quote I assume you are referring to a concept of freedom that makes no sense. You’ll say that when we sin, we are slaves but when we do what is right, we are free. OK, so if we’re slaves when we sin, then we can’t be blamed! But that doesn’t make sense, that undoes the moral universe just as much as total determinism. Moses says:
I call heaven and earth to witness against you today, that I have set before you life and death, the blessing and the curse. So choose life in order that you may live, you and your descendants, 20 by loving the LORD your God, by obeying His voice, and by holding fast to Him; for this is your life and the length of your days, that you may live in the land which the LORD swore to your fathers, to Abraham, Isaac, and Jacob, to give them.
The exhortation to choose life implies we are free to choose death. Both sin and virtue are exercises of free will, in my opinion. However, I would argue that neither existence nor freedom are “goods in themselves” for human beings. We can use either for good or ill.