The amount is not significant, but I want to somehow punish this scammer.
The only possible way of punishing someone is to contact them via another telegram ID and try to get more details about them. I mean it might or might not work but obviously, the scammer would have blocked you, I assume by now.
I sent a Tether to the Tron blockchain, there is no outgoing transaction from his wallet, most likely this is his own wallet, what can you think of?
Yeah surely if the coins aren't moved yet, it surely belongs to him. Usually, coins at an exchange's address are moved immediately.
Or forget and forgive?)
I don't know what to suggest but if I was in your shoes and got scammed for a small amount, I wouldn't bother wasting time with a scammer and instead forget and move on. If the guy for any reason needed that money like some kind of emergency, I would even feel fine about getting scammed but obviously, we can't know it.