@Mezmer
There are certainly people who believe all these tropes you've just listed and many of them lack critical thinking skills. I know a lot of them.
But there are also people who believe the exact counterfactual to these from the opposite side of the political spectrum, ie that all is rosy in the UK and that immigrants are all to blame and that if Britain wasn't brilliant refugees wouldn't be arriving here in boats and that only problem with Brexit was that it wasn't a "harder" Brexit etc.
We all need to be far better educated to "read" media and understand it for sure. Far better critical thinking is needed and much better political education.
All that said, I do think that its measurably the case that public services are in a far poorer state today than they were 20 years ago in many parts of the country.
There's another thread on here in which a woman was told she was facing a five-hour wait for an ambulance for a very sick baby. This sort of situation would have been unthinkable in the early noughties.
There is a palpable sense that for many people in the UK, services aren't being delivered effectively, whether that's public or private services, that there isn't enough money to fund healthcare or education.
I am in an extremely privileged position in that I am comfortably off and have my health so I'm not in the eye of this storm. But I still feel extremely vulnerable and unprotected by my government and public services.
I feel that I have to pay for absolutely everything conceivable, from healthcare to education, in order to be in with a chance of getting through life undamaged. My daughter's experience at a state school during COVID was so woefully awful and so damaging to her education that I decided to go private as I just couldn't rely on the state sector providing the basics. This is not the fault of the teachers, who did an admirable job under awful circumstances. But the provision was appalling. Similarly I have no expectation at all that the NHS will meet even the most basic of mine and my family's health needs at the moment. It's just not available to anyone other than those who can pay for it.
Obviously I am extremely privileged to be in a position to afford to pay for this and I'm conscious of how this could make me sound. But it also makes me very angry because it didn't used to the case that you were totally thrown to the four winds and left to fend for yourself (and pay for everything) at every step of the way. There was a basic level of state provision of all these services which wasn't always excellent but at minimum was adequate. This just isn't the case today.
So to answer the OP's question, if you have money you can still have a tolerable quality of life in the UK. If you don't, you just can't.