That is fine though, everyone knows Finn got his own happy ending.

Mako does date both of his though. He just fucks up and decides to kick Asami to the curb for Korra, then finds out she's kind of a bitch of a girlfriend, then decides to go solo for a while.

And hell, just two for Finn? He had so much game in the show, might as well change his name to Link because so many girls wanted him. He even made it with a sentient body-pillow that one time, which is like every guy's dream, right?