Did Vader really want to overthrow the emperor?

In canon, Vader was more skilled in lightsaber combat than the Emperor, but not in Force power. Narratively, it makes sense that Vader didn’t try to kill the Emperor before Return of the Jedi as killing him was an important part of his redemption, and previous attempts would have taken that impact away.

Why did Vader never challenge Palpatine?

Because he was weak and fragile and he needed a apprentice so that they alone could take on Palpatine and Vader was weak towards force lighting thanks to his artificial limbs and he could not use it. And he was weak and useless thanks to the suit which improved his dark side powers by hurting him.

Did Palpatine and Vader ever fight?

Vader never ever attacked Palpatine, he thought he had no chance against him alone.

Why was Darth Vader so loyal to the emperor?

He sacrificed himself to save his son, which redeemed him and allowed him to become a light side Force ghost at the end of the movie. That is why Vader stayed loyal, because to betray him was suicide and until his moment of redemption he had no reason to kill himself taking on the emperor.

Why did the Emperor choose Starkiller over Darth Vader?

Vader served as his top enforcer, but he always wanted someone more powerful — that is simply the Sith way. With his connection to the Force stunted by his own armor, the Emperor saw Vader as a tool to toss away when inconvenient. This started with Galen Marek — soon to be known as Starkiller.

Why is Darth Vader’s armor so important?

Darth Vader’s iconic armor in the Star Wars franchise remains one of the most important aspects of his person. His helmet and life-support armor remain one of the most iconic parts of the character — alongside his iconic wheezing and red lightsaber.

Could Darth Vader have killed the Emperor?

Star Wars Legends, specifically the novel Dark Lord: The Rise of Darth Vader, explained that even though Vader was capable of killing the Emperor, he wasn’t in good psychological condition to do so.

Why did it take Darth Vader so long to turn on Palpatine?

That said, it’s still curious why it took him so long to turn on Emperor Palpatine — not only did Emperor Palpatine fail to fulfil his promise of keeping Padmé Amidala alive, he also played a part in her death, and keeping his lover alive was Darth Vader’s only goal.