Maybe you're thinking of
reader1? His forte was writing sentences no one could decipher. But I gave him the benefit of doubt and assumed he was not a native English speaker.
Or maybe
Resonant Serpent? He gave us this memorable line, which made its way into at least one forum regular's sig:
...this may be the point where the ancient guitar-slinging primates get off the boat, and they'll be replaced by a new generation of users.
How about
Crush? He'd duplicate each DAW complaint on the Presonus and Reaper forums, just changing the name of the DAW.
As you know, I collect these gems as a hobby (cheaper than snowglobes) and I've got a zillion of 'em.
Some are wonderfully profound:
"Our tools don't adapt to our demands. I've been having this argument with my guitar for about fifty years." (Clint Swank).
Or maybe "Can you drag and drop your unending sadness into a project and then delete it?" (although the OP has already exempted himself from quotation).
But the three individuals listed at the top are the repeat offenders. At least, I assume they're three different people.
But my collection is not complete. I do not save the merely rude posts, so no Sherriff or DKFH. I also don't save any that were meant to be serious but only revealed a profound ignorance of the subject, so no {
redacted} or {
redacted}. Only when they cross over into blatantly rude arrogance do they make my collection, e.g. "I'm not interested in joining a scientific debate of the ins and outs of digital audio. ...Ultimately, facts don't matter." Those are words to live by.