I'm with you... personally, I always found Clean/Onion to be more annoying than helpful in practice... you're working on a feature or section of an application, only now you have to work across disconnected, mirrored trees of structure in order to work on a given feature.

I tend to prefer Feature-Centric Layout or even Vertical Slices, where related work is closer together based on what is being worked on as opposed to the type of work being done. I find it to be far more discoverable in practice while able to be simpler and easier to maintain over time... no need to add unnecessary complexity at all. In general, you don't need a lot of the patterns introduced by Clean or Onion structures as you aren't creating multiple, in production, implementations of interfaces and you don't need that type of inheritance for testing.

Just my own take... which of course, has been fighting upstream having done a lot of work in the .Net space.