I agree, but I can strongly recommend Claude Code with the Intellij plugin. Actually works pretty great for kotlin!

And, JetBrains finally started working on an open language server. It's not perfect but it makes it bearable to at least edit Kotlin in Cursor/VS Code.

https://plugins.jetbrains.com/plugin/27310-claude-code-beta- https://github.com/Kotlin/kotlin-lsp