My biggest nitpick against Go was, is and still is the package management. Rust did it so nice and NuGet (C#/.NET) got it so right that Microsoft added it as a built-in thing for Visual Studio, it was originally a plugin and not from Microsoft whatsoever, now they fully own it which is fine, and it just works.

Cargo is amazing, and you can do amazing things with it, I wish Go would invest in this area more.

Also funny you mention Python, a LOT of Go devs are former Python devs, especially in the early days.

Which part of the package management/modules system do you find lacking?