Narcissists often exhibit a range of manipulative and self-centered behaviors, and one of their common defense mechanisms is to project their own negative qualities and feelings onto others. When it comes to their ex-partners, they may indeed label them as "crazy" or mentally unstable in an attempt to discredit them, avoid taking responsibility for the relationship's problems, and maintain a sense of superiority.
This behavior is part of a larger pattern of gaslighting and emotional manipulation that narcissists use to control and undermine their ex-partners. By painting their ex-partners as unstable or irrational, they aim to cast doubt on the ex-partner's perceptions, emotions, and sanity. This tactic can be effective in confusing and disorienting the ex-partner, making them doubt their own reality and judgment.
It's important to note that not all narcissists behave in exactly the same way, and some may not resort to such extreme tactics. However, labeling their ex-partners as "crazy" is a common pattern among narcissists due to their difficulty in accepting criticism or acknowledging their own flaws and mistakes.
If you suspect you are dealing with a narcissistic ex-partner, it's essential to establish boundaries, seek support from friends or family, and consider professional help or therapy to process the emotional impact of the relationship and regain a sense of self-worth.