It's not gov.uk's fault that you have a shitty experience doing that. The Government Digital Service (most well-known as "gov.uk") have never been involved in the Universal Jobmatch site that was contracted out by the DWP to Monster without consulting the GDS. I have no idea why you're attacking gov.uk for it - I repeat, they had literally nothing to do with it.
> URLs for unique resources works fine. The gov.uk as a namespace doesn't help usability. I'm happy to be corrected with evidence.
gov.uk is a platform developed by the GDS, not simply a namespace. It covers everything on the "gov.uk" main website, and a selection of subdomains, but not all (anything that existed while DirectGov was still a thing is not maintained by the GDS, essentially).
The majority of gov.uk revolves around a CMS that can manage many types of content. It provides a consistent interface for the people who create the content - people from every single Government department - to publish it, and a consistent backend that allows the developers to build new services that utilise the existing infrastructure.
Before, we had a pile of independent websites built and maintained by each Government department with no integrated search or organisation, a lot of duplicated technical effort as everyone had to maintain their own CMS, and an extremely poor user experience.