Kizaru didn't really have anything to offer and Oda was ridiculously forced to nerf Luffy
I hope at least Kizaru is removed from the story, he is no longer relevant to the story
Egghead made him feel like he was never relevant at all. Egghead made his introduction during Sabaody and his entire existence feel so pointless (much like a lot of things). All that hype of him being light incarnate, moving at the speed of light and blasting a skyscraper sized tree to smithereens with his foot, all for nothing. As if admirals didn't become even more of a joke after Ryokugyu got wifi-diffed.
Oda made a huge mistake in giving an admiral a power that is literally pure energy with no easy elemental counter outside of haki, so he had to make Kizaru a weepy moron just to nerf him enough for Luffy to deal with. If he was gonna be this disappointing, he should've just made his logia power something less extreme and solid, like amber, sulfur or gold, etc. I wouldn't be surprised if Logia awakenings don't even exist. Ffs being an admiral stan must be pure pain.