However, the best iterations of this trope include a crucial element:
Critics of the trope argue that the Mesugaki is often just a bully with a fancy label. Causing someone to have a panic attack to "liberate" them is not kindness; it is psychological torture.
Before Mesugaki-chan opens her mouth, ask: Is what she is about to say objectively true? If it is just an opinion or an insult, she is a bully. If it is a hidden truth that everyone is ignoring, she is a Mesugaki.