To say I'm disappointed is to remain silent. Although this story does contain a lesson: when you have more than one girl "on your hands," you have to be fucking persistent to bring the elephants to light. If he had been persistent enough back then, on the beach, it's quite possible his family would have consisted of four girls. I'm damn sure of that. When you remain silent, you push the problem deeper, turning it into an insoluble one, which is what happened.
If the author's goal is to convey this very idea to the reader, then yes, I damn well agree with the author. The situation was potentially worthless, but MC escalated it to the point of explosives and a lit fuse. MC is an idiot!
Men, be fucking careful with your ladies. Attention is often cheap, but it can prevent explosions that will cost us dearly, even leading to lifelong regret over a missed opportunity we'll remember for the rest of our lives.