There is a saying that goes by "Never attribute to malice that which is adequately explained by stupidity." And gamblers are not the sharpest bunch. This could explain why they can not follow the scam report format.

I do think that the vast majority - if not all - complaints are genuine in a way that the person complaining feels like they got cheated/mistreated by the casino. I am sure the feeling itself is very real, although there is a high - about 50% - chance that the complaint is actually invalid.

I can understand those feelings. I believe most invalid complaint are invalid because the player somehow breached the ToS. However every single ToS I have read by offshore licensed casinos are extremely anti-costumer. They refuse any liability, can be changed anytime, include tons of reasons for which they can ban you and confiscate your winnings, many of those are not properly defined thus open to (their) interpretation. If someone get penalized because of such unfair rules it is understandable that they feel upset. Of course it is still their fault for not following the ToS, at least the parts that are not open for different interpretations. However, most gamblers probably do not even read the ToS at all, at least not until they get burnt.

I think that the low effort, invalid complaints are more akin to rant posts, than actual accusations, even if they call it as such.