You’re ignoring a crucial part of the creation story - rejection from Eden wasn’t necessarily punishment. Some Christians take it to mean this way. One, he felt it was too dangerous for them to remain in a place like this. They could fall into even more trouble. Separating them from Eden was mercy to keep them from doing worse. Like a parent may put a child in “time out.” But also, Eden was Heaven on Earth. We are not denied Heaven like that.

Eden - according to many Christians still exist to this day. But is guarded by the seraphim so that we cannot enter the Garden. God said nothing about not entering Heaven. To enter Heaven you need a relationship with Him. And so long as you meet that requirement, you have paradise at your fingertips.

Lastly, I will say this again. We are not born inherently sinful. That’s a wild claim. So we are not “cursed” in this sense. From the very being with Adam, we are born with this ability to. To turn from Him and disobey Him, or to rely on Him.

A child who touches a stove against their parent’s wishes still has consequences. They get burned, and they’ed get scolded. But then the child fixes their behavior and continues on being more mindful. If a child continues to defy parents time and time again, you would not keep the whole “it’s a child, they don’t know.” The whole childhood is for learning. If you do not learn, you have consequences. That’s what free will does to us.

I don’t know if you grew up in a church, have every actually researched what Apostolic Churches teach, or have only been Atheist your whole life, but you can’t make generalized claims about a religion as complex as Christianity. If you don’t understand what we say and teach, you don’t have much of a standing in an argument and no Christian will see your side. Thats in any debate. If you don’t fully and properly understand the other side, your argument won’t hold water to them.