On the one hand, they tend to prefer physically attractive and high-status partners to boost their egos by association. On the other hand, they tend to denigrate others, including their romantic partners, as a way to feel superior.So how can narcissists simultaneously see their partners as valuable trophies while also seeing those same partners negatively?

In public, they boast with their partner.
In private, they denigrate their partner.

And they only see themselves as truly valuable.