For example, this headline:
 
Parenting 2020: Why online classes make me want to tear my hair out

[ Daily O | 01.09.20 | LINK]

However, saying I told you can make you appear arrogant, so tone is important.

For example:

• You suggest a change of venue for the annual conference but this is interpreted as disapproval or dislike.
  

However, by saying:

• No, I’m not looking for trouble! I was just thinking aloud about changing the venue as we’ve been going there for a number of years and the service isn’t as good as it was.

The expression softens the comment and indicates it was not aggressive or confrontational; merely a personal observation.

 Why Lewisham’s plans for Millwall’s Den really take the biscuit
[the article bemoans the Labour council’s approved plans for compulsory purchase of the land around the ground which could threaten the football club’s basic operations]  
 
These same qualities of resilience may be needed again after the decision this week by Lewisham’s Labour council to approve plans for compulsory purchase of land around the Den as part of a mass “regeneration” project. Millwall currently rent the land under threat, the loss of which could threaten the club’s basic operations.

They offered to buy it at a higher price. Lewisham chose to go with the developer Renewal, which is ultimately controlled by offshore companies with mysterious owners and whose plan involves shoehorning in 2,400 homes, the huge majority for private sale, as part of Boris Johnson’s ramped-up “New Bermondsey” vision.  
 
References:
[HITC | 09.09.16 | LINK]
[The Guardian | 09.06.16 | LINK]

It is not necessarily used to insult but to express surprise and disbelief with what has been said or done.

Paul McCartney Does Not Hold Back With His Response to That Quincy Jones Diss

In August, music legend Quincy Jones spent a portion of his wide-ranging interview with New York magazine’s Vulture bad-mouthing Sir Paul McCartney and the Beatles. In the interview, Jones called the Beatles “no-playing motherf—-rs” who were “the worst musicians in the world,” and seemingly reserved special ire for McCartney himself, calling him “the worst bass player I ever heard.”

Now, in an interview of his own with GQ, McCartney laughed off the comments, saying that Jones is “totally out of his tree.”

He then went on to say that Jones called him personally afterwards to both clear the air and deny ever saying the words.

[Time | 11.09.18 | LINK]