Any player who still depends on ratings from trustpilot will eventually be fooled at the end of the day, I personally stopped depending on ratings from trustpilot a long time ago as I believe 90 percent of ratings on that site is bought or influenced my some give away or bonuses, forums like this are the best places and ways to discover and find genuine review of gambling casinos, I personally have leant to depend on this forum , and sometimes , some outside sources that are trusted, but trustpilot, has become a business rather than a genuine place to trust for genuine trust score of businesses and services.
Feedback/ratings on Trustpilot can be manipulated. So, there is a chance to manipulate feedback of any site/service. In this case, it is very difficult to understand which can be manipulated and which can't be. And it is too difficult to understand which are real and which are not. As a result, the users can be losers. I never rely on any feedback for gambling. For gambling I depends on the forum.
The concept of those services whose objective is to provide a place to find reliable reviews may have worked in previous days, but nowadays manipulating those reviews and shilling is a whole underground industry run for and by shady people. The only way I see a review webpage having some reliability would be if they somehow implemented Your your Client policies, to try to only publish reviews from actual users of those services.
However, obviously those KYC processes will likely turn away people who just wish to share their own personal experience with one or two products. The best way to stay save while choosing a casino or any service which deal with money is to ask for advice in other places.