Swift as a langage is fine, the problem is the ecosystem. It's been driven by apple for too long now, and suffers a lot from it.

You would think that being constrained by one company would ensure the project remains lean, but apple actually had the opposite effect. Instead of focusing on real cross-platform support, or strong language foundations, they kept piling on features that nobody asked but made nice developer conference demos.

That is probably the opposite of true. Go read the forums once in a while, the foundations are really well thought. I agree that function builders were probably added for the shiny SwiftUI (and was added too soon), as well as the property wrappers, but apart from that, the process of adding features in the language is actually quite transparent and well-defined.

Also Swift now has real cross-platform support. All of the libraries I create I test on macOS, Linux, Windows, android and WASM/WASI.