I laughed when one mentioned rap being analysed instead of poetry
Why? What's your definition of what poetry is? That's a very narrow view of the arts, especially since the arts are in constant development. Setting the bar for 'what art is' and then keeping it there forever does everyone a disservice.
Much of the new stuff taken from the extreme liberal agenda is already being taught (ie from the extreme liberal agenda) and is unfortunately basically indoctrination.
Please provide some concrete examples of what is in the current curriculum that you consider extreme and liberal.
Critical thinking skills is about children knowing facts, being able to distinguish between facts which are indisputable and those in relation to which different interpretations exist, and being able to make connections for themselves to produce cogent theories/ideas/argument.
In a subject like History, there are a lot of things which are about different interpretations and actually not all that many which are about facts. I mean, the dates on which things happened are broadly indisputable in recent-ish history, but once you go back a few hundred years even that becomes murky. And actully, you don't need to stick exclusively to facts in order to teach your students to think critically, make connections and produce cogent theories and arguments. Analysing different interpretations does the same, as long as the student is taught to understand that sometimes, there are no certainties.
You seem to want a comfortable set-in-stone black/white curriculum in which answers are right or wrong. That kind of simplistic thinking is symptomatic of the typical GBeebies viewer.