Why karma does not seem to ‘come back around’ to those whom are intentionally hurtful

Karma tends to be widely misunderstood. Most of us are only taught the ‘eye for an eye’ theory. This very basically instills a Kali or cosmos-fearing mentality that makes us think twice before indulging in a less than loving impulse. What goes around comes around is not always how karma plays it self out. There are many loving reasons for this.
I will start by saying that it is part of being human to be hurtful on occasion, especially when we get triggered. When this happens we sometimes feel the need to defend ourselves against a perceived wrongdoing. When we are in this dark and angry space, love and compassion is the only way for it to heal and turnaround.