Went nowhere in the sense: did not result in sex? Then it's certainly something the guy was doing wrong, the girls are going for Tinder dates specifically with that goal. The OP said they they "did not result in anything serious", so i assumed it meant "no relationship", but this is simply not what Tinder is for. Yes i know a lady who built relationship from Tinder, but she had to do about 500 dates over 3 years go be able to pick the right guy, it was exhausting and not an efficient way to do it for sure.

Spending 15 hours to get 3 hookups is good. One could do more swipes to get more, spending proportionally more time, if the city they live in is good enough (and yes Tinder is a numbers game so it works for guys only in big cities)