It's very hard to learn form gambling mistakes. First of all you have to realize you are making a mistake and not just luck. Most of gamblers blame the luck and that is all for them!
To bad for those who can't accept their mistakes because they can't move forward and just have self pity all the time and just even end up broke. We're all humans and making mistakes is just usual so learn from it but what's unusual is when you always commit the same mistakes all over again. It's different story tho.
It only makes sense if we are not aware of our mistakes, but that's bad. makes sense does not always means good, gambling errors are not just happening when losing, or gambling errors are not just defeats, but when you place a bet and that's not the right time, or you place a bet always with a large amount, the larger the bet then gifts are getting bigger, but it's too risky