Why do they appear to have put zero effort into making there site accessible to screen reader users? While it's usable there unlabeled buttons, no semantic way

Why do they appear to have put zero effort into making there site accessible to screen reader users? While it's usable there unlabeled buttons, no semantic way to move between different parts of a chat, and often times generated code is not read by my screen reader and I have to use the copy to clipboard button then paste it into notepad.