those who win are those who are not influenced by emotions, these are good words that I have ever heard and if practiced then the results are very good for all aspects of life, as well as in gambling, those who gamble carried away by emotions will only experience losses, such as OP's case, he said he lost when betting big but won when betting with small capital, i know it's not easy to control emotions, but learning to control it is very important, especially since gambling is an activity that risks money, don't be emotional for a moment so we lose the money we have worked so hard to find.
Yes, you are right because those who can controls themselves with good will not face a problem while they are playing gambling. They can know what they must do in gambling and not become too serious playing gambling because they thinks that if they place a big bet, that can cause them losing their money and that means, their money will runs fast without they realizes. The gambling can tempting many gamblers if they can't control emotions, especially if they want to chase the win or recover their loss. They better to playing gambling for fun and only placing their bet with the money they can afford. That will be safe for them because they don't have lose too much money as they can manage their money to be used for playing gambling.
Everything will be related to financial management and how gamblers have financial support, those who do not have good management and have sufficient financial support will always place bets with large amounts of money.
Maybe they will be able to accept few losses but in the long run they lose an amount of money that is truly unacceptable, gambling will always provide puzzles that lead to curiosity.
Just imagine, if gambler has sufficient finances and bets small amount, he can win more and from here comes the curiosity to bet more decent money in order to win big.
But the performance of gambling is to give gamblers the opportunity to lose and those who cannot survive with big bets will only lose the amount of money they have bet, but if they persist they will actually win, but not commensurate with the money they have lost.
As gamblers, we must consider all the decisions we will make in gambling because if not, we as gamblers will always experience loss and loss, even worse destroying our lives.
Best attitude in gambling related to finances is to be able to limit the amount and determine the amount that can really afford to receive if lose.
There is no need to be ambitious about betting large amounts if end up losing, we must always be able to consider the risks involved.