iOS 26 is the worst release of iOS in years mostly due to the horrific change for the sake of change UI nonsense. Liquid Glass aka Make it Hard To Read Stuff skin is a travesty. The new transparencies make things objectively harder to read. The new Messages colors are awful, and faded versions of their prior self, and there’s only so much you can do in Accessibility to revert these changes.
And on top of it all, it’s laggier and slower than iOS 18, with choppy animations. Even the screenshot shortcut takes longer to work. The camera app is now even worse, with awful controls to switch to e.g. Portrait, and that whole bar is choppy as well on an iPhone 16 Pro Max.
I suspect the new iPhone Pro line, with increased speed and 50% more RAM will do much better, but for those of us not on iPhone 17 Pro, iOS 26 is a downgrade in terms of performance, and it’s not subtle.