Harmless Revenge
It's rare to witness someone execute the perfect revenge, yet the OP managed just that. Their petty plot doesn't inflict any real harm on the magazine, but it does provide a satisfying sense of justice.
This is often the best way to seek retribution – without causing significant harm. After all, the magazine had the right to terminate an employee, so they shouldn't face severe consequences. However, a bit of light mischief might just satisfy the OP's sense of justice.