I have clients trusting me by sending me more then 0.01 eth for web design/developing projects and this guy accusing me of trying to scam people on small amounts ,he is a joke ... noob
Irrelevant.
The only thing you got going for you is that your "betting service" is so ridiculous that no one would likely use it anyway. If you can convince other people that you're a harmless moron then maybe you can get them to oppose the flag.
I'm not sure but he is the same person at 2015 in my opinion. I'd checked some of old messages, his writing styles are so similar (2016-2020). He always used (sentence - space...space - sentence). This is a charecteristic writing style.
On the other hand, maybe he's just a very smart person who can imitate well. A proof with a signature will be better if available.
Not saying it's a different person, just that their presence on the forum and their reputation has a 4-year hole in it and last DT trust rating is from 2015, so it's not like they had 5 years of trading history to start offering escrow services.
1k per month just to wash the toilets in my office ...