The author looks knowledgeable, and the text is certainly interesting to read, but I really dislike the slang here and there.. You know, people of whom you talk

The author looks knowledgeable, and the text is certainly interesting to read, but I really dislike the slang here and there.. You know, people of whom you talk, were more refined than the bums on today's tv screen.. I suppose it is the author's "sense of humour". Or the absence of mine, but still..