OK, so you're happy with the article and most of what JB has written, but you object to two specific phrases used. Why make so many posts dwelling on this rather than commenting on your agreement with the rest of the article?
You said yourself that "do gooder" is used by many people of all political persuasions about many different people whose actions they disagree with, and that it's not inherently right wing.
The other phrase you objected to is "right on". This is often used against so-called progressives by people who are more socially conservative, but not necessarily right wing.
Adopting DM language when writing for the DM seems appropriate to me. It will appeal to their readers. She would have written a different article for the Telegraph or Times - or the Guardian if they'd let her.