I meant weeb shit as in it being an English tweet with Japanese in it. It's as if it's such a normal thing to read Japanese nowadays or sumtin.
The joke is fine though, but you have to both be familiar with league and with Japanese which is some S-tier weeb shit.
I wouldn't say you need to know anything about Splatoon/league in order to understand this, because 100% of the necessary context is in the tweet itself.
But yes, it's surprising to see so many upvotes for a joke that requires the ability to read some Japanese in a mostly English community. But to be fair, it's funny as hell.