This is probably going to turn into a bit of a whingey rant, sorry 
Disclaimer that I'm not talking about most nurses, doctors and staff, who are lovely and doing their best in unfair, overworked and underfunded circumstances.
However in my years of going into and out of the doctor's office for help and support, the feeling of being pushed out of CBT because I hadn't made enough improvement during sessions, the dismissal both I and loved ones have had when going to GPs about any issue other than depression/anxiety...
Plus the fact that specialist clinics for things like ADHD, EDs, etc (especially for adults) are still hard to access and shockingly underfunded despite these issues becoming increasingly talked about amongst the general public...
Of course I'm grateful we have an NHS, grateful that I'm not forced to pay for everything like in some countries, and grateful that I'm safe and relatively comfortable enough to be complaining about this. I'm definitely luckier than a lot of people on the planet, and I know it's a less-pressing issue to complain about, on the grand scale of things.
Still not going to stop me from complaining, though! 