Note that they state "all things that have already been fixed". Did you use Go when these oversights were present?
The Go authors have explicitly stated they don't do things until they figure out the right way to do them. No language gets it all right out of the gate, but Go got pretty close with e.g. its standard library.
Come on.
He should try golang and then come back instead of relying on blogposts to form his opinion
What they are not stating is that Go is a conservative language with a standard library hampered by that conservatism, nor are they making a judgment on the current state of the language.
If you are going to criticize someone's post, give them the respect of actually reading their argument, and not just writing a knee-jerk reaction.