In the Game of Thrones series finale, Drogon, the dragon, did not avenge his "mother" after Daenerys Targaryen was killed by Jon Snow. Instead, he turned his anger on the Iron Throne, melting it. This moment raised many questions among viewers, and here are a few possible explanations:
1. Drogon understood that the throne was the real reason for Daenerys' death
Dragons in the world of A Song of Ice and Fire have intelligence that is difficult to measure in human terms. Drogon could have seen the Iron Throne as a symbol of power that led to Daenerys' death. Instead of taking revenge on Jon, he destroyed the very purpose of her life, which ultimately destroyed her.
2. He did not consider Jon an enemy
Jon is a Targaryen by blood (even though he was raised as a Stark), and dragons are related to this dynasty. Perhaps Drogon felt this kinship or knew that Jon did not kill Daenerys out of hatred, but made a difficult decision.

3. Drogon did not understand the concept of murder, but felt the tragedy
Some fans believe that the dragon may not have realized that Jon was responsible for Daenerys' death. He saw that she was dead and reacted emotionally, destroying what he may have seen as the cause of her misfortune.
4. Metaphorical meaning
The creators of the series probably wanted to show that the IRON THRONE is the true enemy, because of which endless wars were fought and people died. Its destruction emphasizes that the struggle for power destroys those who seek it.