As any other big casino, Betpanda has some people that complain about it. The reasons can different. Some people lose their money because of bad luck and then blame the casino. Others have problems with withdrawing and hurry to complain before their case is resolved. Others feel like they were treated roughly by the support and so on. It will always be like this with any big casino. Once you become big - there's someone to complain.
Complaints can be good for a business development if they are good ideas of discovering something ungood, need to be improved and the company actually take it into consideration, development and improvement.
Complaints can be scam accusations that can be either valid, invalid and if invalid, just move on. While if it is valid, the company must resolve it for users and resolved cases are like trust marks for their business reputation too. It's realistic that all business companies, like you said, will have complaints and accusations with time, the matter is how they resolve these things.
So far with Betpanda as I see, it's good, no negative trust feedback, no active flags, they are doing well.
