I know that as gamblers, everyone can relate to this question, as we have surely experienced it in real situations.
Suppose our bankroll is $100 and it has already grown to $500, would you quit or continue? Conversely, if with our bankroll, we are down to $10, would you still continue or save the remaining $10? I used specific amounts to make it easier to discuss this situation. I understand that we all gamble with different amounts based on our income, but consider this as an example. You can mention any amount you want based on your personal experience; it doesn't matter.
Personally I had a set target both when winning or losing I quit, however before I reached that conclusion it took me a while to achieve it, from my past experience in gambling I was find it difficult to quit after some losing streak until the fund is gone because I usually experience some urge to continue gambling probably I may breakeven unfortunately ended up losing all, while I find it easy to quit after some winning streaks because I always withdraw all my profits earned, meanwhile I believe other gamblers find it difficult to quit after some winning streaks and after a loss, now I am more disciplined, manage and control my gambling habit.
I think your approach is pretty good buddy, you already have one way that is not too difficult for you to do, which is to stop when you have managed to achieve a number of wins compared to applying greed like gamblers who are already addicted in general, and maybe so far I see that you only need to solve the problem related to self-acceptance, in the sense of training yourself to accept the facts of the defeat you experienced so that you can be more responsible for the decisions you have taken that will not make you continue gambling to chase the break-even point when you experience defeat.
As we know that we all always say the following also by suggesting to fellow gamblers having the ability to stop at the right time is an ability that is really recommended, because this ability can really make us gamble sufficiently and avoid various unwanted possibilities such as losing money in larger amounts.