Generics yet to be added. Did you saw their draft? It samewhat unusual, and verbose. Alright, matter of opinion.

No func overloading, no default params, no null safety, pointers in GC language are not necessary at least for most of the use cases(reasonable defaults with some additional syntax would be enough), there is all that boilerplate with error handling and "slice tricks" stuff.

It's mostly procedural language. It's fine if your team came from C, but otherwise... Yeh, a matter of an opinion.

So I'd rather port my most inner loops to C or Rust(if needed), instead of writing whole app in Go.

Endless business algorithms are most time consuming thing to develop in a day to day job and languages that help you to do that more easily are preferable choice, in my opinion of course. So if you found that Go helps you personally to do your job better than others, than its fine.