Rebecca Quayle, who has terminal cancer, has had to wait in A&E with people coughing and taking Covid tests.
One man who gave up trying to get an appointment with his GP was diagnosed with bowel cancer after he went private.
Trainees say they are left in the dark and have worked thousands of hours for nothing.
The Royal College of Paramedics said it expected to see similar recruitment freezes across the UK.
The cost of fixing the most serious repairs at major hospitals alone is more than £600m, figures show.
Betsi Cadwaladr health board has spent most of its existence in special measures.
Report finds patients in Wales are left frustrated by "8am scramble" for GP appointments.
Baroness Hallett has recommended capacity be increased in urgent and emergency care in Wales.
