People still don't realize that Anakin's combat style completely changed when he became Vader. His limited mobility forced him to rely on powerful deliberate strikes and overwhelming new Force abilities amplified by the dark side.
The fast agile Jedi Knight was gone.
I’ve seen a few people having a problem with Daki landing a hit on Vader but I don’t get it, he’s a Jedi Master who is more than likely very old and very experienced, Vader isn’t untouchable.