What describes a one-way and competitive conversation that may be emotionally loaded?

A one-way and competitive conversation that may be emotionally loaded is best described as a diatribe. In this context, a diatribe presents a strong, often vehement attack or criticism of a particular issue or perspective, typically involving one speaker dominating the conversation with little regard for the input or perspectives of others. This form of communication is characterized by its intensity, emotional charge, and lack of a cooperative exchange of ideas.

Unlike dialogue, which implies a mutual and constructive exchange of thoughts, or debate, which, while competitive, allows for structured argumentation and rebuttal, a diatribe lacks balance and can often come across as aggressive or dismissive. Discourse, generally speaking, refers to any formal discussion of a subject, which may not necessarily embody the competitive or emotionally charged nature indicated in the question. Thus, a diatribe captures the essence of the described conversation effectively.