OP didn’t say that memes can’t be textual in nature, OP complains about snappy Twitter, 4Chan, Reddit (idk about this one? Reddit does have memes in some subs) or similarly sourced screenshots of texts.
Such posts, while possibly humorous, and occasionally a bit funny, are not spread rapidly by Internet users, and rarely posted with any variation.
I never said I don’t like the screenshot I referenced, I just looked up for “twitter screenshot” on DDG and took a representative link. I find the content of the screenshot mildly amusing.
However, many people (including me) do not consider those to be memes;
if the most widely recognized definition of the word includes them, then I question its usefulness beyond a synonim for “funny quote”.
But you are completely right about what I complain about. A meme often contains text, and sometimes even is purely text (for example a popcultural reference in a text-only medium can be considered a meme), but a single (maybe even witty) tweet or a forum discussion without any further context is maybe funny, but not a meme.
Then let me put it this way:
OP didn’t say that memes can’t be textual in nature, OP complains about snappy Twitter, 4Chan, Reddit (idk about this one? Reddit does have memes in some subs) or similarly sourced screenshots of texts.
Such posts, while possibly humorous, and occasionally a bit funny, are not spread rapidly by Internet users, and rarely posted with any variation.
Example 1 - this is a meme:
“Nanomachines, son!”
Example 2 - this is not a meme:

Hahaha, looks like we’re back to arguing about the old No True Memesmen falacy…
Screenshots of text that you don’t like aren’t memes because of reasons
I never said I don’t like the screenshot I referenced, I just looked up for “twitter screenshot” on DDG and took a representative link. I find the content of the screenshot mildly amusing.
However, many people (including me) do not consider those to be memes;
if the most widely recognized definition of the word includes them, then I question its usefulness beyond a synonim for “funny quote”.
Haters gonna hate, but you deserve this.
spoiler
Just a recent reference
But you are completely right about what I complain about. A meme often contains text, and sometimes even is purely text (for example a popcultural reference in a text-only medium can be considered a meme), but a single (maybe even witty) tweet or a forum discussion without any further context is maybe funny, but not a meme.