Please, for the love of god, please don’t be this person. No matter how long it’s been since an update, no matter how many unfinished stories are sitting on their account, no matter what - do not be this person.
Not only is it insanely rude, but you also do more damage than you think be being such a self-entitled ass about something someone created for free and for fun. “This author” can see what you say.
Katara is separated from her friends, and so she's left to travel the earth kingdom on her own. She stumbles across Zuko, who is similarly travelling on his own. They decide that pairing up and travelling together would be best