Is this about Bitsler or you are ranting about losing money from gambling, you lose 300 dollars four years ago but you cannot get over it, and still remember everything you should not cry over spilled milk and try to change your mindset on what gambling is if you're still playing in a casino, moderate your bet and your time until you have control on your urge to gamble, that's where the fun starts when you have control on your urge to gamble and your money.
Either he is promoting Bitsler, in a way if someone read about his topic post, they will know that the gambling site he is talking about is not guilty of anything. This is one if the ways more people can know more about the gambling site, or he is truly just lost money and bring it up here. But this seems more like a way for more people to know about Bitsler.
But my advice is that it's better not to return to gambling, whatever the reason because there is a possibility that you will experience a bigger loss and maybe your sadness will repeat itself.
This is the best advice that someone can give another person. But my own advice would be that he can just try with little amount of money, see if he is getting addicted and losing money like before, if he has no control over gambling, the best is to just quite.