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One thing with this whole thing is that, even taking legal action against them involves you spending money, and if at the end of the day, such legal action did not help you recover your lost fund from them, it becomes a double loss..
Unfortunately, I have to agree with you. Taking legal steps against Betnomi only makes sense if you either don't care about the money for the lawyers and the effort (flights, ...) or if an insurance would pay for the lawsuit. If neither of these is the case, the risk is simply too great that in addition to the loss on the platform, you will also be stuck with the costs for the lawsuit - if it can be legally brought about at all.
As bad as the loss is for each individual and I do not begrudge anyone such losses but unfortunately the following sentence applies to online gambling platforms, too:
Not your keys, not your coins.