The thing about abuse is that it has to be excessive or misuse of some power. Generally, mental abuse should require that the person being abused say that they don't like whatever is being said and for what is being said to be objectively meant to harm them (serve no legitimate purpose, phrased vulgarly). If it does serve a legitimate purpose and was delivered in a decent way, then I don't see how that could be abuse. That is protected speech. Forcing someone else from expressing their views just because someone else doesn't like it would then also fall under mental abuse and restriction of of their protected speech.