Is quitting ever justified?

Well blame this stupid challenge system, they made it seem like everything is swappable, if like last week you needed 25 mangler kills in swat and you load up with a BR it is what it is then, but if they make the ultimate swappable it might slow the quitting down some, 99% of the matches i stay and play but when it’s close to me getting off i will quit if I’m activally hunting a challenge