Is expressing annoyance bad karma?

Is there a phrase for speech which doesn't hurt someone's feelings, isn't gossip or malicious (meant to harm them in some way), but is in some sense still wrong speech? A sort of *indignant* speech? > feeling or showing anger or annoyance at what is perceived as unfair > treatment. Is it forbidden, bad karma? I understand that it is often *unhelpful*, but am unsure if it's neutral or wrong.