It is kinda funny once you get used to it. When there is bad news they say “it’s so over” and good news “we’re so back”. The emotional rollercoaster on LK-99 is pretty intense and these phrases capture that for people. I get it at this point.
So it's the same as the Bob Ross memes of "Ruined", then :)
It's a relief valve for crowd mania. Humans really love to communicate in jokes, especially when those are in-jokes.