A project like dMania CAN and WILL exist on STEEM!

You tried to do all by yourself but you failed unfortunally. You are a really good developer, no doubts about it but you were missing some other keypoints.
I do not think that shutting down dmania is the right decision and I am pretty sure you will regret it. Maybe you can restart at "Steem2.0" on the EOS Blockchain.

I recommend you for your future projects to listen more to the people that want to help you, not to get too greedy and stand straight, when you do mistakes.

Best regards