I get that these people are not in your circle or whatever, but the term 'golang' appears nine times on Go's own case studies mood board: https://go.dev/solutions/#case-studies
Personally I suspect people more readily adopt 'golang' because all the mailing lists used it as the prefix, the domain was golang (as opposed to go-lang), the official subreddit is /r/golang, and the developers have such a habit of prefixing things with 'go' (as in GOPATH, goroutines, etc). I used to believe it was because there was another programming language with the same name, but I never did find examples of its use in the wild, so I'm no longer sure that affected anything.