I mainly judge by my personal experiences. I have spent entire nights in our local A&E with my elderly mother, being ignored, while she spews her guts out. One occasion she went to the hospital on her own and it was left to other patients and their friends/relatives to help her as she struggled with acute pain. Yes sometimes the NHS works great, I am aware of that, but in my area it is a lottery to say the least. If I or any of my family need emergency help now we will either go to Bristol or Cardiff as the service in the local hospitals is just so poor.
It may be better for you if you are in England - don't forget that in Wales we have had muppets managing the health services for 25 years or so. My dad was let down badly by his GP and then when he had a fall at home he could not summon help and when the neighbours raised the alarm it was too late. If his GP had actually seen him instead of just giving him repeat prescription month after month he might still be here. My wife had a terrible battle with our local GP to get her mum assessed for dementia. Finally after eighteen months she got referred, and the memory clinic said there would have been more help available for her Alzheimer's if they had seen her earlier. I could go on, but in my area health services are terrible and don't work.
Also bear in mind that there are many alternative funding systems available. NHS Wales has a budget of £9 billion. The best part of one billion of that goes on free prescriptions. This is partly a waste of money, and if they followed the model in England (where it is means tested) they might be able to afford one or two more nurses in my local A&E (it works out the Newport area spends £53 million on free prescriptions - if even a tenth of them had to be paid for that could potentially pay for an extra 40 nurses and thirty nursing assistants). Why do we in Wales give everyone free prescriptions? And that is just one example of terrible waste - I bet there are more...
As for the BBC, I think they make a lot of good programmes, and I love listening to the cricket on the BBC radio. But what I object to is having no choice but to fund them. I think they have a very strong political agenda. So do many other organisations - but I choose not to fund them if I don't agree with their point. Why am I forced to pay for the BBC? If the funding model changed to subscription then as long as lots of people like the output they would still be well funded.