Understand 憎人富貴厭人貧(窮)
I think it depends on what you mean by a &quot;description of this expression&quot;. The deeper you go, the more you'll have to explain it, and it will have to touch on sociological and psychological research, for which Psychology &amp; Neuroscience StackExchange might be better.
The Chinese expression itself is fairly transparent, with no words that are particularly difficult for native speakers.
In English, finding an equivalent translation is simple. But for the sake of literary expression, something more balanced would be more native-sounding. E.g.

to detest the rich and despise the poor
to have contempt for both rich and poor
to hate on rich and poor alike

I have even seen:

He who hates wealth hates poverty.

... but I'm not convinced that this is an accurate interpretation.
Explaining that it is a type of 小人心態 &quot;a petty-minded attitude / the mindset of a villain&quot; or 受害者心態 start to touch on what the original expression &quot;means&quot;, and this requires a bit more context on what kind of explanation is needed.