Oh I'm really sorry for you because you've bet on gambling too many times but didn't get a big win. I'm also a bad luck like you because I've bet many times in my life but never got a big win. But the biggest win of my life was bet $100 and I won $300 a bet. But I have gained an important experience from life where gambling will never give anyone a big deal in life. No matter how much you bet hoping to win a bet, you will never be able to establish yourself. You will see that the amount of loss you have made and the profit you have made will definitely be more than the loss.
It is same with almost all gamblers, as I have also not win big since I started gambling, but I have won little amount several times. Gambling presents us with the opportunity to win big but it hardly come to pass due to the alogarithm of the casino and it is impossible to know what will happen in the future when we bet on future games. However, one can learn a lot in sports when you are gambling, especially if you are doing your research yourself on the teams that will be playing against themselves before you stake on the match.
Yes, as you said, this activity gives us all the opportunity to get a big win, but as you said, it is impossible for us to know what will happen at the end of the session between winning or losing, and what this means is what is called a game of "chance" where you cannot be sure that your hopes will actually come true.
Simply put, winning is nothing more than a chance and losing is another possibility that is part of gambling, and this is why gambling is called an activity that can never be predicted about the results, and logically it is impossible for casinos to provide leaks about the algorithms they have while it is clear that gambling is their business which aims to make profits from the majority of losing players. So this is why the idea or concept of earning money in gambling can never make sense.
On the other hand, of course improving your skills in sports betting by studying statistics and the depth of the team you are going to bet on is an idea that makes it possible to increase your chances of winning, but still limit your expectations of victory, because this idea cannot guarantee victory.