Is the candidate or the client crossing the line of business ethics? Do not accumulate everything in yourself — indicate politely, but firmly that such a style of dialogue is unacceptable for you.
Has there been some misunderstanding between you and a colleague, or is there something you would like to share? Talk with them, calmly and politely state your point of view and arguments, share your experiences. Again, a busy work rhythm and frequent stress can sometimes add tension in relations within the team.