Quitting something you no longer care about is more straightforward than something you’re spirited about but isn’t working.
To avoid quitting a passion too soon or too late, a basic rule of thumb is to give up when the outcomes aren’t improving, even after ample effort to turn things around.
That is to say, when things get difficult in school, business, relationships, or a project, increase your efforts and get help to improve it. If the results are still unacceptable after an adequate interval of much effort, maybe it’s time to throw in the towel on that course of action or rightsize your expectations, if not abandon the pursuit altogether.