'Why doesn't a God just let us know that he exist in some way that all people could understand.'
The logical conclusion is that the commonly accepted western god doesn't exist. If it doesn't move, doesn't do anything observable, no activity; death is the logical conclusion to reach.
'Human minds can't grasp the concept of something or someone not having a beginning. Everything we see on earth dies. Life is so complex and the only real common thing is reproduction. Everything spends it's life reproducing more of it's kind and if it didn't it would all go away in a hundred or so years, except trees.'
Yes, eveything basically is born, grows, then dies. It's the same, throughout the universe, stars for instance, are described as being born in clouds of gases, growing, living millions of yrs, then dying. Their parts are recycled into other stars or planets or whatever. While i'm not saying that they are necesarily alive or conscious, the process is similar to what takes place on the earth. In fact, all matter on this planet was forged in stars.
'If there is no life after death we don't have much to look forward to except death.'
Personally, due to some observations, i do believe in life after death. But, that's me. Since it's not a scientific thing, there isn't much that i can say about that.
'I guess he has fun creating stars and universes etc. since he is still doing it.'
Again, there are natural processes doing that. Scientists can observe and explain most of them. No actions of any god or work of god is observed in any of them. Everything in the universe, from the formation of stars to the evolution of humans can be seen as on single process, governed by a few basic formulas. This can be illustrtaed by how snow flakes are created. God doesn't make each snow flake. The way they form are based on the formula of water molecules, the atoms that make up water. It's similar for a lot of stuff in the universe.
The way i understand the universe and life on this planet, is that it's basically free, it's all democratic. Animals can do what they want, are able. Same w trees, or stars, or humans. The 'laws' that we have among our civilised societies are directives that we have basically agreed on, and then we have created legal or military systems to enforce them. Democratic. That's how it is, when there is no omnipotent, omniscient biblegod.