I'm not sure why I didn't connect the Italian horror you referenced earlier with some gems that very much fit into this category for me. Hell of the Living Dead being one, Nightmare City being another. They are absolutely terrible, but I can't help but love them. I know there are more from this era, but my brain isn't working today.
Hell of the Living Dead is probably the worst of the Italian zombie movies, but for some reason I really enjoy it for all it's insanely bad dialogue, graphic cheapjack gore, and pitiful attempt at social commentary. Plus, it's a great excuse to listen Goblin's awesome Zombi 2 score while watching a completely inferior attempt at being something like it.
Of course, Burial Ground is right there with it. There is absolutely no plot and is just an excuse to fill the screen with nudity, tons of cheap (but awesome) gore, shoddy looking (but even more awesome) zombies, pedophilia with the glorius Peter Bark, and just all means of bad taste.