> almost seems like Go is trying to become some sort of C# or Java Frankenstein
The original Go team was trying to avoid this:
"Java, JavaScript (ECMAScript), Typescript, C#, C++, Hack (PHP), and more [...] actively borrow features from one another. They are converging into a single huge language." [0]
That team has since moved on, and now Go has begun to join that convergence.
The problem is that most programmers seem to want to write Java, more-or-less. New, simpler languages come along, but once they get popular, the pressure is on to turn them into Java-likes. It happened to Python and now it’s happening to Go. It takes a strong will for language maintainers to say “no”, and their language will suffer in popularity as a result - see, for example, Ruby.
[0] https://go.dev/talks/2015/simplicity-is-complicated.slide#5
I would argue that languages like Java (C#, Kotlin, etc.) strike a very good compromise between modeling ability and comprehension, which is why they are popular and people gravitate toward them.
You can have more complex languages like Scala that provide stronger modeling ability, but at the cost of complexity. Golang started off as extremely naive/simplistic, and is now converging in some ways. But it still has a ways to go: no generics on interfaces, no unions/ADTs, no pattern matching, no proper enums, error handling leaves much to be desired, and much more.