> I feel like Bootstrap (and similar) are a lot "to blame" for some of these.
IMO, it's more about developers just using Bootstrap without reading the documentation. The examples are pretty well done, they use semantic elements and are accessible.
For example, the Navbar[1] element has a good HTML structure and uses `aria-label`s that announces what's going on to assistive technologies.
Another one is the modal example[2], it has semantic elements, the `tabindex="-1"` attribute to make it accessible to keyboards and the correct use of the `aria-label` as well.
So, their documentation pretty much teaches you how to use it correctly. I'm not a fan of Bootstrap myself, but I think throwing the blame at it is unfair.