Meeting girls through online dating apps and then things going bad is a common occurrence, so someone thinking that it is a great use of time is absurd.
Consider the statement "Every time I meet a girl on Tinder and she starts to like me things go bad.". Based on this "The reason why I think online dating is a perfect use of time is because every time I meet a girl on Tinder she starts to like me and then everything goes bad" a true statement? Yes, no, or I don't know?