If I see many people posting the same issue here well maybe it can convince us that there's something wrong with Roobet but since this claims doesn't have enough proof so I will find this claim shady.
Well, I can understand that if I won some bet, but turns out it is all void

I couldn't be more irritated. Although unnecessary, his frustration is reasonable for him, so I won't call it shady. Not to mention his friend also has some "issues" with Roobet.
The thing I want to say is if he insists Roobet has something to do with it, collecting more verifiable and provable proof is the thing he should do, instead of rattling unnecessarily.