I'll post what was written in the following link as just one example of why the show has fallen so far:
https://www.quora.com/Do-you-think-Game-.../Tim-Filla
Yes, very much so, in my opinion.
The problem the show has run into is that the showrunners are approaching it from the wrong angle. What made the show popular, in their minds, is its plot twists. Game of Thrones was all about the Shocking Moments. The show became famous for killing characters. So the showrunners assumed that’s what people wanted: shocking moments and killing characters.
The problem is, that is NOT what makes Game of Thrones or A Song of Ice and Fire a good show or book. George RR Martin doesn’t sit there thinking of how he can shock the most people. He’s telling a story that revolves around characters, and oftentimes the story doesn’t go in the direction we think it’s going, and that results in a shock.
George RR Martin said in an interview recently: “It’s easy to do things that are shocking or unexpected, but they have to grow out of characters. They have to grow out of situations. Otherwise, it’s just being shocking for being shocking.”
This may or may not have been a subtle dig at Benioff and Weiss, the Game of Thrones showrunners. The show has done a very poor job at making their Shocking Moments grow organically out of characters. They’re being shocking just to be shocking, because that’s what they think drives people to watch the show.
I’ll give two examples of Shocking Moments from the show: one from Season Three that’s an example of how a twist is supposed to happen, and one from Season Five that is how a twist is NOT supposed to happen. Obviously, SPOILERS below.
The first is in Season 3, which I consider to be the high point of the series. In Episode 3, Jaime has his hand cut off by Locke, one of Roose Bolton’s men (it’s cut off by the Brave Companions in the books, but the effect is the same). This is the pivotal moment in Jaime’s character arc. Before this, he is arrogant and entitled. He knows he is one of the best swordsmen in Westeros and is the son of the wealthiest and most powerful man in Westeros. Even as Robb Stark’s captive, he believes he’ll get out of it due to his importance.
Locke (or the Brave Companions) see(s) this. They are fed up with his arrogance, and want to teach him a lesson. They cut his hand off. As a result, he has to rethink his entire identity. He can no longer be the warrior he was. For all his family’s wealth and power, he was unable to stop this from happening.
The twist was a reaction to Jaime’s personality, and its aftermath fundamentally alter Jaime’s character - in the books mostly, but also in the show. In both, he starts to rethink his relationship with Brienne, in part because of losing his hand, and thus his identity and sense of purpose. In the books, and briefly in the show, he tries to distance himself from Cersei, because Cersei no longer values him and thinks he is lesser. He reforges his identity separate from Cersei. (Sidenote: this is another problem I have with the show: inconsistent characterization and erratic character development. The show starts to head down this road, but then…completely subverts it, as Jaime is now Cersei’s pawn again in Season 6.)
Now, for the example of a bad twist. In Season 5, Sansa leaves the Vale, goes to Winterfell, and marries…Ramsay Bolton. In the books, Jeyne Poole, Sansa’s friend from the early days of the series, is purported to be Arya and sent to Winterfell to marry Ramsay. She is horribly raped, and Theon helps her escape. Sansa stays in the Vale. In the show, they replaced Fake Arya with Real Sansa.
Why did they do this? For the Shocking Moment. It happens ONLY for its shocking value. In fact, the writers defied logic and characterization to make it happen. Why does Sansa agree to marry into the family that murdered her brother? Because Petyr tells her to “Make them yours?” What does that mean? What does she expect to accomplish? Somewhat a sidenote, why does Petyr want this to happen? What does he gain by marrying Sansa to the Boltons? He says a few episodes later he expects Stannis to win. What was the point of putting Sansa there? Now his plan is to send a Vale army to the north to fight the Boltons. He put Sansa there to have a casus belli? He sacrificed a Stark, far and away the most valuable bargaining chip in claiming the north, to do this?
Going even further, this twist subverts Sansa’s characterization. At the end of Season 4, she (somewhat randomly) emerges strong and empowered with a new outfit. Then a few episodes later she’s crying, begging Petyr not to take her to Winterfell. But she does anyway. Then she gets raped. And she just sits around Winterfell crying and yelling at Theon the rest of the season. Then Theon, who has been thoroughly psychologically broken, helps her escape. But she’s afraid to cross a river. But then a few episodes later she meets Jon, and she’s now empowered again, demanding they go to war to take back the north. Where are these characterizations coming from? It also seems so random and disjointed.
So, summing up, Sansa’s rape was a twist that did not grow out of characters. It did not grow out of the situation. Her plotline was clumsily and inexplicably forced into another character’s plotline because the writers thought it would be more shocking.
That’s why the show has declined in quality. Now that it’s more successful and running out of source material, the writers think they can change it however they want in order to create their own shocking moments. This is happening even more in Season 6. The Martells are stabbed out of no where, because they’re “weak”. Roose Bolton, his wife, and his newborn child are killed. Osha is killed. None of these have any meaning anymore because they’re done so randomly. These twists are done for shock value and shock value alone, not to further the story.
I would argue that A Song of Ice and Fire is popular not because of its plot twists, but for its well developed characters. What made Ned’s death, or the Red Wedding so powerful wasn’t that they were unexpected. It was because we were made to care about the characters. And then, their deaths came from their own decisions, and their own characterizations. Ned was killed because he was honorable to a fault. Robb was killed because he fell in love. That’s infinitely more powerful than Sansa being raped because she decides to marry Ramsay for no discernible reason. That’s not a plot twist, that’s the show being sadistic because that’s what they think people want.