Despite Xcode being the one and most used IDE for iOS, it is far from perfect
No one ever said it was. People use Xcode to write apps for Apple's market, not because they like Xcode.
I have used many tools in my career
Perhaps that's the problem. Xcode is currently at version 16.2, and even that's not true. The original Project Builder app was 22 years old before it was discontinued. There's a whole lot of history and legacy that you seem to have missed.
Slow debugger: not sure what bloat Xcode has or what it is doing, but sometimes it can take more than 10 seconds from breakpoint firing to actually see values.
Try using print statements instead. In many cases, especially UI-related, breakpoint debugging simply isn't possible. There are far too many event loop iterations that happen in normal behaviour.
Find usages:
Have you tried "show callers"? That seems to be the equivalent functionality.
Visual debugger: debugging SwiftUI with visual debugger is in 90% useless task and waste of time.
Many of your complaints seem focused on SwiftUI. That's a delicate topic. I recommend focusing on why you're using Xcode in the first place. Because you love Xcode and SwiftUI? Or because you want access the market? Just because Apple publishes and pushes a given tool or framework, doesn't mean you have to use it.
I have 64GB of RAM and sometimes it seems it is not enough
My primary computer has 32GB of RAM and my test rig only has 16 GB. Both have no problem with Xcode. But then, the 32GB still runs Ventura and I gave up on SwiftUI a long time ago.
Compiling SwiftUI previews and getting them to work. NIGHTMARE!
Yeah. That was maybe the first thing I dumped when trying to use SwiftUI.
I do not get it. first make SwiftUI framework, and then neglect all tools to make it easier and faster to use? I would understand some company with budget problems, but Apple???
Apple runs a very tight and lean ship. The teams behind the features, frameworks, and apps are much, much smaller than you might imagine.
Why did IntelliJ managed to make better IDE in less time and even make it more expandable with extensions?
Their developer and user market share is a tiny fraction of Apple's.
With better tools you will get more developers and with that more apps
Apple has many more developers and apps than it needs.