It's not the current government that's on its last legs, it's your system of government. With the upcoming coronation, police are being given sweeping new public order powers and opponents of monarchy are being pre-emptively warned not to upset the apple car or face penal consequences. Meanwhile the establishment press regales the populace with an endless torrent of nonsense about how many twists are in King Charles' gold braid and what sort of 500 year old pie recipe will be served at the royal feast.
After briefly abolishing the monarchy and establishing a parliament, the UK went back to being an aristocracy and went in an imperialist direction instead. The peasants and later the working class were willing to put up with it by virtue of feeling that they were at the top of the international heap and thus far better off than all those savages in the colonies. As imperial dreams faded under the stress and cost of war, the country pivoted to being the center of a 'commonwealth', but at its core its still an aristocracy, with nearly unlimited privileges for the very rich or the very well-bred, and open-air prison conditions with bread and circuses for everyone else, kept in line by an especially cynical press. The whole Brexit mess was based on nostalgia for the days of Britain being an empire with a built-in moat. The only things saving the UK from international irrelevance are money (in the sense of being a tax haven for the very wealthy), a seat on the UN security council, and a small nuclear capability.
Nothing is going to change until the country becomes a republic, and the only way to get there is to abolish your benighted aristocracy, confiscate its assets, and convert a subject population into citizens by refactoring your legal code to make it meaningful and comprehensible to schoolchildren. Otherwise it's just going to continue down the Harry Potter theme park track.