The education system infuriates me. I go to a technical school, it's meant to be for intelligent, motivated people to learn in peace and safety. But because of our ban on new grammar schools, bullies were let in - had to be let in - and their actions taken for granted. People insist standards are high, but they're only high if it's someone with a history of being civilised doing something wrong. It's just expected that there are violent people who will fuck things up for everyone around them, and nothing is really done about it.
Problems with the NHS are not about the model, they're about the funding. The current government has defunded Public Health, has defunded social care, and has defunded the NHS. They've also made it harder for people to immigrate to the UK. These decisions have caused immense pressure on the NHS.
We already have a Euro-style insurance model for dentistry, and everyone agrees it doesn't work.
I can't give much in terms of life advice, but maybe you'll find this video from Strange Parts interesting, a YouTuber who almost lost everything due to a head injury and got terrible advice from well-meaning medical professionals. I have No idea if this could possibly be useful, but I hate the idea that someone might be able to recover still but never gets the right help.
https://youtu.be/Gs790JOeN3Y
There's so many different kinds of head injuries, though, and I'm sure they are all very different. But, I still wish you best of luck in recovery.