Here are a few formal options, each with a slightly different nuance:

Option 1 (Neutral and Direct)

Air Chief Condemns Misinformation and Hostile Narratives Surrounding Military Operations

Option 2 (Emphasizing the Source)

Military Leadership Denounces Falsehoods and Adverse Narratives on Operations

Option 3 (More Formal/Action-Oriented)

Air Force Chief Rebukes Adverse Narratives and False Claims on Military Campaigns

Option 4 (Concise)

Air Chief Refutes Misinformation and Hostile Narratives on Operations