I think one really important thing, which differentiates the Makorra/Korrasami conflict from the Kataang/Zutara one, is that even if you ship Makorra hardcore and feel upset at this ending, which I understand - I really do, and I sympathize - you can feel hurt and post about your disappointments, but I do think that it’s worth acknowledging the amazing step in terms of social issues and representation that Bryke has taken.
Yes, it would be nice to have your ship be endgame, but even if you feel sad and bitter about Korrasami being endgame, on an intellectual, real-world level, you have to applaud Bryke for what they’ve done. This is a HUGE step in the media, and it matters. It matters so much that a mainstream show for children has a same-sex relationship, that kids growing up watching LOK and figuring out their own feelings and sexualities are going to see people like themselves. You can ship Makorra as much as you want - I think Bryke has also done something great in leaving their relationship open enough for plenty of fics and fanarts to ensue - but I think it’s pretty ignorant to hate the fact that Korrasami became canon if it has such a positive impact on real people’s lives in the real world.