You are saying that what god did was just because he is a just god.
That is circular logic.
Now why would god make it where not all humans can have paradise?
Well, that was the original plan....everyone was supposed to live in paradise...but there was this thing called free will. It was a special dispensation to humans so that it would enhance their lives every day. Only we are made in the image of our Creator and we were originally without a knowledge of evil. God deemed that mankind would be better off without it. Was he right? I think we have proven that knowing evil has not benefited us in any way.
Animals don't plan much....they are programmed by instinct and operate according to their programming.....they eat, drink, eliminate waste, sleep and reproduce without much thought as to why they do any of it.
Humans, on the other hand have choices that determine what they do, where they go, and who they hang with. They choose what they will eat out of an endless variety of food. They cook and create their meals and specially cultivate food crops to their liking.....animals do not. Do you appreciate that you don't just eat grass? Or just drink water? Or mate with the first one of the opposite sex that presents you with the correct pheromones with no commitment or love in the act? Do you really know how unique humans are? With language skills, music, art, poetry, theater, architecture, science and technology....we are creative, just like our maker. We were supposed to use that creativity as earth's caretakers.....but rebellion happened and we had to make a detour. Abuse of free will caused the chaos we see in the world. Free will run amok. As caretakers of this planet, we are abject failures, all because of disobedience. But all is not lost.
We alone possess a concept of past, present and future...we can learn from past mistakes and experiences and then utilize that information in a way that animals cannot. We can plan the future and we can take in knowledge to help us plan what we will do next and how we will do it. We have communication skills that allow us to take in information through different senses and to build on knowledge we have already acquired. We have a written language that animals do not need. They plan nothing...they just respond to instinct.
We are so much more than animals.
It is all of these skills and knowledge that are utilized in our search for meaning to our existence....we alone need one. Our search will ultimately lead some to a knowledge of God and of his purpose in our creation. Others will take a different path. We all have choices. I need God to account for my life now and in the future...you may not.
I have no unanswered questions. Do you?