In all that word salad there wasn't any answer to my point, xenophobia has made the UK a vastly worse place to live over the last 15 years.
Don't let the facts get in the way of your rant.
The hostile environment and Brexit made this a significantly less great country and consequently being a UK citizen is less of a big deal than it used to be.
The "hostile environment" was created to make it hard for illegals (those who enter the UK illegally or overstay their visas); others who have also committed criminal offences in the UK or in another country; those who seek to harm those who live in the UK; those who have used deception.
To strengthen that aim, new Acts (laws) were created though the House of Parliament and the House of Lords. I'm not sure where your "last 15 years" figure come from? Removing British citizenship from those born British and who have another nationality, has to be one of the biggest changes and that was mentioned in about 2004 but pushed through with the 7/7 terrorist attacks in London.
In the late 1960s, (also more than "15 years" ago) the UK ended another type of Free Movement to the UK for millions, by creating the The Immigration Act 1971.
Ironically, that Immigration Act 1971 was the same law used to end the EU's Free Movement. It's also the same law you applied under when you wanted to stay in the UK when the EU Cards were no longer valid in the UK. Athough in your case, as a non-EEA citizen you had to rely on a European Court of Justice Ruling for your EEA citizen spouse to sponsor you: then rely on a Supreme Court Ruling to be able to stay in the UK under the UK's EUSS. Which is why you could not apply online to stay in the UK and had to fill in the paper application with lots of questions about your EU citizen sponsor, to see if you were allowed to stay in the UK or had to find another visa to be able to live in the UK.