If two people agree to a debate, but one of them participates in bad faith, and spends the majority of the time talking over the other, sidestepping virtually every point their counterpart makes, blatantly lies, employs personal insults and frequently airs irrelevant grievances, is it still considered a debate?
Depends on the context. Academically? No, that would just be wrote off. In a more relaxed, social setting? I think most people see no differences between an argument or debate.
This feels pretty accurate, too. It really just comes down to expectations, I think