The antonyms of the phrase "reconcile oneself" are quite varied depending on the context. For instance, if one is talking about reconciling with someone, then the opposite is to dispute or ignore them. Disputing involves disagreeing with the person's views and ideas, while ignoring means not acknowledging their presence or concerns.
However, when it comes to reconciling oneself, antonyms involve accepting and being complacent with one's predicaments or situations. These could include resigning oneself to their fate, giving up, or even resenting the idea of forgiveness and reconciliation.
In summary, the antonyms of reconciling oneself depend on the context and could range from disputing, ignoring, giving up, to being complacent, resenting the concept of forgiveness, and resigning to fate.