there is a book. addiction by design, exactly about this.

most of betting houses depend heavily on problem gamblers, I will look for some stats, but the truth is regulators don't care or have controversial ties very often

Yeah, the entirety of the gambling industry is sketchy.

I knew about the gross weird stuff they do at casinos (e.g. hide all the clocks and windows to make it easier to lose track of time), so it doesn't surprise me that another gambling industry is going to employ other sketchy tactics.

I've been fortunate enough to lose both times I ever was forced to engage with sports betting, and as such it wasn't addictive to me at all and I haven't had any desire to do it again, but I could see an alternate universe where I convince myself that I have some kind of "system".