I strongly agree with you that big celebrities like Neymar glorifying gambling,losing 1m in just one hour session and promoting it via his Twitch channel is like promoting gambling via a well known platform and this would have catastrophic consequences on society as even people who have never gambled would be saying,Neymar gambles so why shouldn't I gamble no matter my limited finances compared to him.

I think the authorities who oversee gambling and that always ask big casinos like bet365,betfair etc to always say in their ads,gamble responsibly in the end of the ad should also fine people like Neymar and also the team where he plays should fine him as he is unintentionally also making a bad name for them too,as people will think what team is this that their players are gamblers,they may even fix games in the future because of their addiction.