I can so relate to this. One person had once gravely wronged me. I felt like I should kill him to get my revenge with my own hands.

But I decided to just let out all my tears to God and let God avenge me. 

Indeed after a week I got the justice from God. My perpetrator died.

💥💥💥💥💥💥💥💥💥💥💥

Dearly beloved, avenge not yourselves, but rather give place unto wrath: for it is written, Vengeance is mine; I will repay, saith the Lord.
(Romans 12:19)