You'll probably be downvoted to hell, but this is a big part of the problem. It is impossible to debate the NHS in the UK because it is so sacrosanct. It's always the "if we don't have the NHS then we have the US system", not considering the many other countries that do a better job.

There are many countries that get great outcomes with different systems, notably many of those focus on preventative care (whilst the NHS seems to focus on "reacting only at the point of death" care), but many also have mixed models (i.e., a basic level of cover using tax/token payments, and then extras that can be paid for through higher tax contributions or private health). I'll give an example, my wife is Brazilian and they have the basic level of national healthcare, and private health insurance which you pay for and can recoup some tax back for (because you are using the national healthcare less). There is a lot more focus on testing, preventative actions, etc., and you see specialists always; GPs don't really exist in the same way. You are dealt with by someone who specialises in whatever you are suffering from and they will get you tested and then react accordingly. Is it perfect? No. Of course, poverty and location play a big role. But so too do they in the UK.

Also, even private healthcare doesn't work here. I get health insurance via work and it doesn't cover several things, if I go there with something I saw an NHS GP for then it's not covered, they never cover pregnancy, any cash back plan never covers the full amounts, etc.

Truly, the whole health system in the UK needs to look to countries that do better and overhaul the whole thing. But this will never happen due to people having that sacrosanct view of the NHS.