In life...even after sowing good deeds, choosing peace, and giving yourself to good intentions for others.
The results may turn out to be evil rewards of disparity, sorrow, and suffering.
As much as one may want to believe in karma, it may be just an illusion of self idealism.
As much as one may want to be, live in the golden rule or platinum rule, it may be fair to say it justifiable to call it an eye for an eye instead of good deeds and paying it forward. When evil people recieves good wills, it just stops there or rather they reinvert the deed to become something sinister.
No mantra or religion will solve it. It is the cycle of life and death. Even if we wish it were rebirth and retry. No complaints, just compliance.