If Go is so great, why was Kotlin released four years later and made the standard on Android? It's annoying enough to have to use Swift and Kotlin for iOS/Mac vs. Android. Now Go? What happened to Dart?
Then there's Rust. What about next week?
Dart is one of the three officially supported and approved languages of Fuchsia.
https://fuchsia.dev/fuchsia-src/contribute/governance/policy...
The only language that came out of Google that people have a right to be upset about is PromQL. That's an abomination.
Golang is made for simple deployments, mostly services that need to scale, stuff you'd previously had to use something like C++ or Java for.
Dart is mostly relevant if you're building apps with Flutter.
Kotlin isn't Google's creation, they just recommend it for developing native Android apps instead of Java.
For any of the languages you mentioned, it's easy to find the motivation for their creation, either by Wikipedia or on official pages Why X?. Your uninformed rant sounded a bit lazy and naive (sorry, no offense intended).
From the top of my head... Go was meant as a higher-level language than C where Python could not apply (bad performance, weak typing, no compilation, complex syntax); its wide adoption proves that kind of language was missing at the time. Dart was initially meant as an alternative to JavaScript, like CoffeScript, at a time where JS was less standard. Kotlin was not created by Google, and was meant as a light alternative to Java/JVM, with full compatibility, hence the adoption for Android which is JVM based. As far as I know, Swift and Rust aren't specifically tied to Google.