Feels like I’m going against the grain of the other comments, but let me try to justify it. A lot of people are in bad relationships and are being treated poorly without realizing it. Letting someone know that something is a red flag might be the first step in them becoming aware that their partner is abusive. There’s no “mending” a narcissist.

That being said, a post will only ever give you a sliver of the whole story, which is why Internet relationship advice isn’t really reliable.