This can be attributed to Vader's mastery of the Force, as he's far more disciplined in his older years. His actions might still be wrong and deeply rooted in evil, but he possesses far more restraint as a Sith than he ever did as a Jedi.
One Quality Separates Anakin from Vader in Star Wars
Even at his most monstrous -- as when he murders the younglings in the Temple during Revenge of the Sith -- he acts to protect the people he cares about (in this case, Padmé). The events of the prequels and The Clone Wars slowly strip those loved ones away from him.
In a study published in the journal Psychiatry Research, French psychologists and psychiatrists determined that Darth Vader had six of the nine criteria used for a BPD diagnosis, as defined by the Diagnostic and Statistical Manual of Mental Disorders (DSM): Impulsivity. Rage and anger management issues.
In a Vanity Fair interview from 2005, George Lucas went deeper into why Anakin became much weaker as Vader. In the interview, he explained that because Anakin's limbs were severed and replaced by robotics, it was harder for him to use the Force than it was before his battle with Obi-Wan.
After his battle with Obi-Wan on Mustafar, Anakin's vocal cords and lungs were scorched by lava. Due to this, Darth Vader had to wear an iron lung with tubes connected to a voice synthesizer inside his mask. Using this technology, Darth Vader could speak with a deep, synthetic voice.
3 Deleted Scenes LITERALLY CHANGE how Anakin Became Vader
Why is Vader so quiet?
Age and resignation. He's matured in many ways, become more patient and restrained. He learned from his defeat, and years of quiet study and contemplation. He's not always at the front anymore, and with no rules to restrict him, he really has no tension.
It's a mid-atlantic accent he speaks with; it's supposed to give the feel of Vader's high authority and rank, as the mid-atlantic accent was fashionable in the late 19th and early 20th century American upper class.
Despite being the Chosen One, Anakin Skywalker was not the most powerful Jedi in Star Wars, as that honor goes to Ahsoka Tano. The Star Wars prequel trilogy focused on Anakin's desire to become the most powerful Jedi, and while he became very strong in the Force, his lust for power drove him to the dark side.
Since Anakin's defeat on Mustafar, he needed frequent visits to his bacta tank to survive, and even the Vader suit itself was crude enough for Palpatine to control him. So with an aged body, a mind out of balance and the surprise of Luke's attack, Vader was caught at his weakest point.
As Powerful As Darth Vader Was, Palpatine Was Always Greater
When all is said and done, Palpatine's brains ultimately trump Vader's brawn. Vader didn't stand a chance against Palpatine because Palatine had the upper hand from the beginning.
According to our observations on Star Wars, Anakin presents a BPD pattern mainly related to emotional instability, impulsivity, and aggressiveness traits.
Behind his mask, he squeezed his eyes shut in an effort to hold back the tears that he was physically unable to wipe away. But no tears came. He didn't know whether the surgical droids had altered or removed his tear ducts, and he was beyond caring.
Anakin absolutely did regret many of his bad choices. After becoming Darth Vader, he pushed the regret down for awhile by dissociating himself from Anakin before the suit.
It's because they're two different actors, and Vader (David Prowse) is taller than Anakin (Hayden Christensen). Originally, Lucas wanted Vader to look huge and intimidating, so cast a really tall guy. Later, he needed Anakin to be an emotional young man, so couldn't have someone who looks like a giant.
The realistic answer seems to be, yes, Anakin in his prime could have defeated Luke Skywalker (in the current canon) if they battled one-on-one. The main reason behind this is Luke's lack of formal Jedi training, at least when it comes to combat.
Darth Vader's loss of limbs prevents him from using force lightning, a common ability among Sith, making him weaker in comparison. Vader's reliance on his mechanical suit weakens him in battle, reducing his agility and mobility from his days as Anakin Skywalker.
It was the fact that Luke was his son that caused turmoil within Vader. It was his love for his son that caused his loyalty to Palpatine and the Dark Side to falter. If Vader didn't know who Luke was he would have been just another force sensitive person to be trained to serve Palpatine like an Inquisitor or be killed.
Yep. Darth Maul didn't really say or show straight up that he "feared" Darth Vader, but he openly stated his belief that he could not defeat Darth Vader without the help of the Jedi, therefore on his own.
In those movies, Mace was someone who loved confrontation, with his bullish ways usually winning arguments. However, he rubbed many the wrong way, and as the novel detailed, he was someone vehemently against Anakin joining the Jedi Order.
Given the years between these comics' publications, it's hard to tell if Gillen built this argument intentionally or not. Regardless, the core concept is still true. Thanos wields more power and authority than Darth Vader, existing as a stronger and more capable villain overall.
Padme's death fuels his rage, and his rage dictates his actions. It is only when he saw Luke, when he lost his anger for a second and felt his love for his son.
By the reign of the Galactic Empire, ur-Kittât was known as "the Old Tongue" or simply "Sith." However, it continued to be spoken by Galactic Emperor Darth Sidious, who taught it to his apprentice, Darth Vader.
