If everything has a purpose then evil doesn't exist

[R-Farmer]

the word evil in the hebrew has several different meaning. It is a literal catch phrase that is used to describe anything bad undesirable or unwanted.

Here is the general definition:רַע raʻ, rah; from H7489; bad or (as noun) evil (natural or moral):—adversity, affliction, bad, calamity, displease(-ure), distress, evil((-favouredness), man, thing), +exceedingly, × great, grief(-vous), harm, heavy, hurt(-ful), ill (favoured), + mark, mischief(-vous), misery, naught(-ty), noisome, + not please, sad(-ly), sore, sorrow, trouble, vex, wicked(-ly, -ness, one), worse(-st), wretchedness, wrong. (Including feminine raaah; as adjective or noun.)

here is the definition in context:
†1. evil, distress, adversity: יָרֵא רַע fear evil Psalm 23:4; Zephaniah 3:15; בּוֺרֵא רָ֑ע Isaiah 45:7 (of God), הביא רע 

https://www.blueletterbible.org/lexicon/...v/wlc/0-1/

While evil is a possible translation, the context supports the idea of calamity as in god is bringing the pain/He will do whatever it takes to crush the enemy of his servant Cyrus whom God is fully supporting. That he is willing to rain down evil and or calamity to the nations that stand in opposition to his servant Cyrus.

I’m not sure that a god who creates adversity, affliction, calamity, displeasure, distress, grief, harm, hurt, mischief, sorrow, misery, trouble, wretchedness and wrong really helps your case.

Boru

I can see how that is a problem if you think god is all loving/loves everyone equally..  I can see how this would not generally be considered a plus or attribute of God. The truth of the matter is God can be down right vengeful and spiteful. especially to those who do not belong to Him. This is indeed a good example of this. that said the p[assage does not imply god puts evil in the heart of men. But rather is raining evil down on those who oppose his servant Cyrus. If you think this is bad wait till you hear about Moses and pharaoh at the Red Sea crossing.