How can a Christian reject part of the Bible and still call themselves a Christian?

[Sword of Christ]

Now I'm wondering if your reading comprehension is just that bad, or if you are misrepresenting my comments on purpose.

The deal is God gives us life and freewill and everything you question is explained in this context. So you're basically saying life and freewill is a bad deal as that's how what I have explained to you.

God imposed a bad deal on us, by forcing us to sin and then offering the cure for something he forced on us.

No God gave you life in a physical body and he gave you freewill. The problem of sin is a consequence or byproduct of the existence God gave you in the first place. I don't know how many times I need to repeat this.

Two humans turned against god, and the rest never got the option to make the choice that Adam and Eve made.

Genesis is a metaphor for the human condition.

Either god is terrible at planning, or he arranged this purposely.

The plan is a very good one if you understand it. No-one would believe in this if it was something as awful as you believe it to be. You get your life/existence, you get your freewill and you get full salvation from sin and death direct from God himself as well. Feel free to point out the flaw in the plan.

He wants us to be grateful to him for giving us a cure when he could have simply not infected us in the first place.

We're not infected with anything. We are subject to certain unpleasant things given the nature of what we actually are, death is an example.

God makes it so that we cannot avoid sin, yet you call this "free will" and treat it as a gift. That is insane.

You can't avoid physical degeneration through the aging process and death or physical and emotional suffering either but life itself is still a gift. A gift that has a downside but you would rather not have been born at all?

If the result was unavoidable then god is not the creator, or he is such a poor designer that he locked himself out of his own sloppy design and is taking his own incompetence out on humanity.

The design is 100% perfect, intentional and essentially good. With some unavoidable consequences for living beings as previously noted. The consequences have been taken care of through the message of the gospels and the death and resurrection of Christ.

If you have to contradict yourself in order to make sense of your beliefs, you should probably scrap them and find something more coherent.

It's perfectly coherent, you have life, freewill, sin and death as a consequence and you also have grace and salvation through God himself.

The concept of free will is not compatible with having a genetic propensity to "sin" deliberately coded into our DNA

We're not genetically coded machines, we have full freedom of will. Yes we have physically evolved bodies which will have an influence on us certainly, we have an animal nature as well as a God nature. But this is life, the thing God wanted to create and we like to have and appreciate.

all so that god can offer to remove the defect if we just kiss his ring (and the attendant eternal punishment if we simply go along with the compulsion he coded into our genes.). At the least, it is contrary to the notion of a just or loving deity who only wants what is best for us.

We're influenced certain physical things but we're also influenced by God. How we go about defining ourselves and our life under these influences is how we have freedom of will. This is something we would want to have, we don't want to be pure instinct driven machines or pure angels at Gods command we like the opportunity to decide for ourselves. This is what being physically alive as human being will give you. Sin and death is the consequence of something we want to have.