Well, IIRC the strings package for example is pretty much all functions, and so is fmt (IIRC). You might not consider these packages “well-designed” but they are certainly idiomatic. I don’t have the inclination to go trawling through the standard library for other examples, but I will say from experience, as a former Java developer and now a Go dev, I’ve sometimes found Go‘s approach confusing because it’s more function oriented than OO.

So I guess our experiences differ, which of course is fine, but I respectfully don’t concede the point. :-)