Something in the original is better than korra, stop the presses.But Zuko was a heart throb and still had an actual story and character trajectory. Mako was just a living breathing tool with zero personality that brooded and when they fixed his character arc he was just a detective with zero personality.
And the dude fucked up all of his relationships, he was worse than Bolin. After Mako's two relationships he was borderline asexual like Morrissey.
Focused on his job detective man, is is a common way of writing heartthrobs. It just has varying results