In my experience, people who complain are people who may not be able to be sincere with what they get, namely failure. I don't blame people who are disappointed to complain or get angry when they fail, but I really regret it when you waste your time just thinking about things like that when you already know you have lost, yes, you act positively, you evaluate or improve all your performance so that you know what part of your mistake, whether it is management, whether it is psychological, whether it is how to open your position or your analysis, you have to look for everything, so in my opinion, don't waste it -waste time on things that I think are not important because the more you complain, the lazier you are to study, the more you won't be able to achieve success, therefore throw away the feeling of complaining for the sake of your future