[fragmede]

unless you want to dumb down the interface so it's more like a wizard, the best you can do is make a framework so the complexity is separate. ie, the business logic is separate from the application logic. without more details it's impossible to say how I'd simplify it but there's gonna be a lot of having to learn your specific use case before suggesting how to simplify it.

unfortunately the complexity has to live somewhere, the only question is how best to manage it.