Yeah, I don’t think you have any understanding of how the crown interacts with the rest of the UK government.

There are some oddities, but the idea that the crown could actually exercise any of their powers, without causing a constitutional crisis, and UK rapidly becoming a republic, is farcical.

> The King gives 'the kings speech' which is used to set the governments legislative agenda to parliment.

You’re aware that the kings speech is written by the government, not the crown. It’s how the government lays out its parliamentary agenda to parliament, the civil service and the country at large. Heck there’s a whole ritual around the crown having to beg permission to enter the commons etc to emphasise the point that crown enters and speaks at the pleasure of the commons.

> The king also steers diplomatic efforts abroad.

No, the king is given instructions by the foreign office on what he’s expected to help with. Every trip and meeting the king does is checked and cleared by the uk government, and they can and have vetoed trips before.

> every single aspect of UKs democracy can be cut by the King whenever he wants.

You should watch the Jonny English movies, they’re a great documentary on how this could happen.