Warning: Contains SPOILERS for Obi-Wan Kenobi episode 3.
Darth Vader is shown at the peak of his powers in Obi-Wan Kenobi, with the Sith Lord seemingly even more powerful than in Star Wars: A New Hope. Obi-Wan and Darth Vader's rematch has been much hyped, but it didn't quite go as expected. Instead of a clash of the titans that lived up to their duel in Star Wars: Episode III — Revenge of the Sith, Obi-Wan Kenobi episode 3's ending fight was a completely one-sided affair, with Vader brutally dominating his former Master both with his lightsaber and through the Force.
Much of that is because of Obi-Wan Kenobi himself. After 10 years in exile on Tatooine as Ben Kenobi, the once great Jedi is no more; indeed, it's rather clear that he's not used the Force in a very long time, evidenced by his struggle to use his powers to rescue Leia Organa in episode 2 and again with his fight against Vader in episode 3. That lack of connection and training, which is crucial to a Force user (and essential to Obi-Wan's lightsaber form, Soresu), results in Kenobi being much weaker than Vader, but it's still only half of the story.
Related: Why Is Obi-Wan Kenobi So Afraid Of Vader When He Already Beat Anakin?
For as weak as Obi-Wan is, Vader is terrifying in his sheer strength and presence. Similar to Rogue One: A Star Wars Story, this is him being fully unleashed, and he proves to be almost unstoppable. Vader is more powerful in Obi-Wan Kenobi than A New Hope for a few reasons, including just how personal this battle is (in a way that first wasn't quite portrayed as): here he is completely tapping into all of the rage and hate he feels, which means he's using the dark side of the Force far more than in A New Hope; he can bend the Force to
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