Yeah, we cannot deny this fact, some bad reviews will warn us to review again the gambling platform, moreover if there are many similar bad reviews with strong evidence. I am sure that we will think several times to use that kind of gambling platform.
Wouldn't it be better to avoid it than fall into it, right? 
And yes, gambling is wild enough. Once we cannot manage ourselves, we will fall into bad sides of gambling.'
Once the platform cannot keep the users' trust, reputations, and solve the problems, they will fall into bigger problems with that kind of accusations.
Building and developing a reputation is very difficult, destroying it is very easy.