The controversial ending of "Game of Thrones," notably Daenerys Targaryen's descent into the "Mad Queen," remains a topic of debate among fans. 

In a climactic, tension-filled exchange, Jaime confesses the harrowing truth about Tyrion’s first wife, Tysha, contradicting their father Tywin's cruel deception that she was a prostitute hired to trick Tyrion. This revelation shatters Tyrion emotionally, destroying his relationships with both his brother and father and igniting a vengeful fury that leads to patricide.

The omission of Tysha’s story in the show arguably diverts Tyrion’s character arc from a complex figure tormented by familial betrayals to a more straightforwardly likable hero.

 In the series, Tyrion is portrayed as a steadfast advisor, wrestling with Daenerys's increasingly ruthless decisions but ultimately remaining a moral counterbalance, rather than the darker, more ambiguous figure he becomes in the books.

By Season 8, as Daenerys unleashes fire upon King’s Landing, Tyrion’s horror reflects the audience's shock. This pivotal scene, coupled with Tyrion’s reaction, could have resonated differently had his character followed a darker path, possibly making Daenerys’s transition to the "Mad Queen" seem less abrupt and more a consequence of their mutually reinforcing dark impulses.

While the show's ending remains divisive, it opens up discussions on how adaptation choices can fundamentally alter character development and thematic focus, impacting viewer perceptions and the overall storytelling experience in significant ways.