I feel your pain, but 'threats of criminal punishments for lazy medical professionals' isn't a great idea. There are already laws against medical malpractice, but it's pretty obvious why prosecuting doctors and nurses for 'laziness' would be incredibly counterproductive and result in a massive increase in bureaucratic ass covering rather than improved care. Ask yourself - what caused the NHS to get into this situation? Certainly reversing those causes would be a good first step to improving the service and fixing the issues they've caused. According to the doctors and nurses themselves, it's all about cost cutting, increases in hours and generally the financial starvation of the service. They're literally out there striking to be allowed to treat you better.
You were specifically criticising "younger diabetes nurses and doctors". Bear in mind also - part of the reason trainees and nurses have such poor pay (and far more importantly, awful suicide inducing hours and conditions cross nationally), is a rigidly hierarchical system where consultants who were themselves overworked and underpaid themselves see this as a right of passage.
https://news.sky.com/story/the-nhs-sold-out-its-staff-doctor...
https://www.telegraph.co.uk/news/2024/05/15/doctors-forced-t...
https://www.bbc.com/news/uk-england-birmingham-64938278