Love and obedience are both voluntary according to Christianity. We have an invitation, but you and I aren't forced to go either way. It's entirely up to each and every one of us.
In Christianity, God isn't just an adult who is a few decades older than we are. He's eternal.
Of course God could have created a world without the godless afterlife. But that would have been equivalent to forcing everyone into heaven, and God respects our free will too much to do that. His company is voluntary.
Jesus taught that God created us for a fulfilling eternal life. Humanity (you and I and most people in history) messed up, and we are currently subject to a partly-godless world, with a way back provided for us, and another way to try and stick it out without God.
I don't want to change your mind about God. If you want to be an atheist or a skeptic, be one. But the understanding in your comment doesn't have much to do with Christianity.
To the AC 2 below:
The tree of morality (kudos, many don't understand it for what it is) represented the choice between letting God tell / teach humanity what's right and wrong. Eating from the fruit was about taking that right into our own hands, which set mankind on a painful but fixable detour.
If God hadn't left such a way out of the Garden, he would have locked us in, which would have conflicted with that crucial principle at the start of my comment: love relationships are voluntary.
