First of all: In my scientific career, reviews have mostly helped me to improve my articles and by far the majority of reviews have been constructive and collegial.
Unfortunately, there were also a few exceptions: Reviewers who obviously had no idea about the topic, reviewers who wanted their own papers cited and therefore tried to steer the paper in their research direction, and those who practiced rude fundamental criticism. The latter was the case yesterday when a reviewer criticized the paper in cryptic bullet points in lousy English and harsh language. There are ethical guidelines from the recognized publishers that are supposed to prevent this, but not all editors adhere to them.
Has something similar ever happened to you and how did you deal with it?