I live in Boston, MA. Taco Bell is horrendously low quality, I can only imagine it's right at the border of being "barely legal to sell" it as food. If you eat it and don't get explosive diarrhea you should consider yourself lucky. People still eat it because (1) it used be (before COVID) actually extremely cheap (really, in Boston's expensive standards it was almost as cheap as cooking food at your home, but worse quality) now it's about the same as any other fast-food chain maybe slightly cheaper (2) some people like the comfort food aspect of it.