The really big bookmakers have a lot of customers. I don't think they are easily steered by the fact that they have a problem with a customer. After all, every bookmaker or casino has a problem with a customer
There are a few gamblers that are dealing with them having bad experiences. They're probably looking for the perfect casino but
the reality is that there's really no perfect casino. And every problem that they deal with those casinos, they're solvable as long as they're communicating well and bearing with them.
I think there
are perfect casinos, if we mean their intentions, but of course mistakes can happen anywhere. That's why the way Support of a gambling site works is of major importance. The reputation of the otherwise good site can be ruined merely by poor performance of their support.
One of the aspects of a gambling website that I heavily relied upon is their customer service. Without any proper customer service where the issues of the gamblers are not addressed, this would take a toll on its general and overall popularity. I remember, there was this famous gambling website but everything shut down when their customer service was reported to be malicious and full of scams.
Like what most have mentioned, it does take years to build a good reputation and only a few seconds to destroy it completely. While I do understand that solving all the issues of gamblers are difficult, this is the hurdle that one must face in order to survive in this business.