So I'm planning to report Tillkoeln to the police to get my money back. I have the proof that he was the owner of Unnamed Exchange and I have the proof about his real identity. I naturally also have proof of sending crypto from Coinbase to my wallet addresses on Unnamed Exchange. The only thing I don't know is how I can prove that those wallet addresses belonged to Unnamed Exchange?
It's a bit unclear why you waited this long. He will certainly not return the money he took by himself.
Try to trace the flow of Bitcoin from the deposit address, maybe you will be able to connect what he did next with that money.
I encourage you to file a case against him, they shouldn't get away with this scam so easily.