They were early in doing decent userland tooling around cgroups etc. Docker Hub too was a genius idea. However their engineering went to crap - tonnes of issue

They were early in doing decent userland tooling around cgroups etc. Docker Hub too was a genius idea. However their engineering went to crap - tonnes of issues with new versions where networking and other stuff broke, plus the whole "runs as root" thing. People only then realised that Docker wasn't the tool, it was the wrapper around it. All this time they were trying to monetise it and failed pretty much. This is the view as an outsider who's used it for years - anybody got a more accurate view?