You know...I feel like most people wouldn't have been so pressed about the Duncney/Gwent break ups if the show had handled it differently.
Like...they're 16. How many people do you know are still together with the person they dated in high school? If you do know any couples like that, I guarantee you that they are the exception- not the rule. It would have been realistic...from what I've read, most high school romances don't last longer than a few months and that's being generous. In my honest opinion, most of the canon ships wouldn't have survived very long after the end credits. They only got to know each other for a couple months, and that's...yeah. I don't think anyone would be able predict them staying together forever.
But the forced love triangle...there are more interesting ways to stir up drama in your stories, guys.