The problem isn’t representing a 4D object in 3D, but the fact that we’re still stuck on devices whose displays are two dimensional.

And displaying 4D on a 2D plane is the hard part.

You can try approximating - like the famous tesseract cube animation - but it won’t convey the three-dimensionality properly, therefore it won’t approximate the 4D visuals of it.

And perhaps not at all coincidentally, your first two examples combined are exactly how an analog television manages to create an approximation of a 2D plane using only a single point. And with a bit of the old 4th dimension, time.