I was thinking this will be about Duelbits, but it is not about Duelbits.
I think you are referring to Duel.com.
I did not know the reason I am seeing this kind of reviews about the site:
https://uk.trustpilot.com/review/duel.comI do not think I can use that kind of gambling site to gamble.
But I do not think I can fault the gambling site because you supposed to use 2FA to protect your account if you are having that much amount of money on your account on the gambling site.
I don't really trust Trustpilot reviews that much. A lot of them, especially the positive ones, could be paid reviews.
Just look at duelbits trustpilot rating. It's almost the same as Duel.com's. So does that mean you wouldn't play on Duelbits either? I don't think so. You'd still play there because duelbits has a good reputation here on bitcointalk. Same goes for other gambling sites like sportsbet.io and rainbet. They have barely 1 star on Trustpilot, but they have plenty of positive feedback and a solid reputation here.
I think the point here isn't really whether you should play on duel.com or not, but how they handle account security. I believe 2FA is mandatory on duelbits unlike duel.com, which to be optional.