I remember this Sonic Disorder / Sisten 343 split 7" was described to be the lowest of the low. Total gutter noise, just lo-fi damage and not much talent, composition, etc. However, when I revisited the 7" and gave it couple spins, other than fact that SD side is way too short and passes by too quickly, it ain't the "worst".
Sometimes the worst, the most low-tech, the dirtiest and ugliest vinyl records have charm what makes impact. I think examples could be the Sonic Disorder tape on Les Disques Bruitistes? And Francois Douris LP on RRR is another what could be described to be such. Not to mention more PE approach, but equal damage dony by Xenophobic Ejaculation. Not long ago I wrote review of Hair Police 12" which probably goes into this category easily.
It's very thin line. What is utmost crap, and what suddenly manages to transfor their rubbish into stuff you actually pay for to hear! Make recommendations & comments. No heavy harsh noise, no loud PE. Just the lowest of the low, that is... good?