There is a difference between being a bad casino and being not a great casino. I understand not finding this casino one of the best, that is understandable, but that doesn't mean that this one is a bad one neither. It just means that we are talking about a place that doesn't give back to gamblers as much as some other places do.
Gambling in the crypto world grew insanely high, which means you would be getting huge amounts back, and casinos are getting bigger so their profit margin could grow smaller. But this place hasn't grown that much, which means it is not getting that much attention anymore, and that could be what your friend was talking about.
That is mainly because there are so many casinos out there these days, which begs the question how do we make our decisions on which one is good and which one is bad. I know that when it was just a few casinos, it was basically either good or bad, but now that there are a lot more that means there are situations where places which are obviously bad, but there are also places which are obviously good, but there are also a ton of places that are right in the middle, just like bitsler.
The number of casinos decides this, if you have 5, then you wouldn't have this problem, but when you have 500+ places then you can't just make it all bad/good and nothing in between.