Six traits mark the rajasic doer: attachment, craving for results, greed, a tendency toward harm, impurity, and the constant swing between elation and grief. This person works — often very hard — but never finds peace.
Picture a merchant who counts his coins every hour. When profits come, he celebrates. When losses strike, he falls apart. The work itself never satisfies him; only the outcome matters. That restless swinging between high and low is the hallmark of the rajasic doer.
Krishna is not condemning this person. The rajasic doer is not evil — just incomplete. There is energy, there is effort. The direction, though, has not yet aligned with something deeper than personal gain.