I wish. Even ATLA had a shit ending.
I cannot think of a single cartoon that actually ended on a high note.
Teen Titans had that awful Terra season after that big finale against Trigon.
FOP and Spongebob went into post-movie zombie mode.
Danny Phantom finale sucked.
Jimmy Neutron sequel movies sucked.
Korra was just one of the first ones to happen after the rise of this social media echo chamber fandom bullshit.