An Envious person oppresses him (or herself)
Al-Hasan al-Basri (rahimahullaah) said:
I have not seen an oppressor who oppresses himself similar to an envious person! He (or she) is always frustrated; permanently sad and upon a distress that never comes to an end.
[Source: Al-Aqd Al-Fareed’ of Ibn Abdi Rabbihi Al-Andaloosi (rahimahullaah)’ 2/170]