Its not about someone posting an "old meme in 2019". It's about someone posting an image without understanding the context and / or the image.It really isn't when you read what the OP is saying and follow the last few Riot threads on this very forum.
I think this reply in that thread you're asking me to educate myself on summed it up the best:
It's posted more as a concept than as its content.
A lot of us 'gamers' are fickle, no point in denying that.
But yes, "hurr durr someone posted an old meme in 2019" and all that.