Xcode is abysmal, I would honestly feel sorry for Apple devs if not for how much money they make. Last time I used it even autocompletion was broken (it would write the text 1 character ahead).
But yeah there's clearly room for a snappier LSP-based editor, preferably one with a toolbar.
I've been using Xcode every working day for over 12 years and on the whole it has been excellent. It definitely has some quirks but it is a feature rich workhorse.
It has integrated docs, simulators, unit/UI test functionality inc coverage reports, live UI debugging, tons of profiling tools, and I can use it to upload my apps straight to App Store Connect. Starting with XCode 13 I also have built in CI/CD. I can build, profile, test and deploy a whole app on multiple platforms from scratch with it. And its free.
Every release of Xcode has been a buggy mess. Every. Single. One. It certainly has lots of features but I'd much rather it had less features and more polish. The worst sin a tool can make is to be unreliable and that's the best word I can use to describe Xcode.
The Apple App Store likes to show reviews that are tied to a country, but at least for the ones I see Xcode sits at a proud 2.6 stars, with hundreds of 1 star reviews complaining about bugs and crashes.
Certainly reflects my experience as well. When the text editor of a development environment doesn't work right, I mean, shouldn't that be job number 1? Search google for "Xcode bugs", you'll see thread after thread of complaints.
I can find major complaints of bugs and crashes going all the way from 9 years ago to the latest Xcode release, no other development environment has this many complaints. It is by far the most buggy and crash prone development environment available today. People _happily_ pay for AppCode for a reason.
The last few are actually alright but there did seem to a be period where it broke every release and dropped highlighting and completion as sourcekit would crap out. Word is internal apple devs were also annoyed and complaining frequently.
But yeah there's clearly room for a snappier LSP-based editor, preferably one with a toolbar.