I am generally pleased with the level of care I get, what frustrates me is the time it takes to get to the point where they can actually fix the issue.
If health insurance companies listened to doctors and stopped trying to delay needed test or medications I would venture that cost overall would go down.
My own experience, I have had back issues, mostly lower back issues for a very long time, I go to the doctor, I get x-rays and nothing is visible, the doc would like to send me to a specialist and have an MRI but before insurance will approve that I need to go to physical therapy as it "could be" a muscle issue, 4-5 months later with little improvement I am finally allowed to get an MRI which shows a nerve issue that physically therapy would never correct, finally 18 months after I see the doc a fix is done.
Second issue I have is that instead of prescribing medications that could prevent an issue from getting worse they say "nope, not unless you have had these other issues". In my case my weight climbed in part due to back, knee, shoulder issue restricting my workout, that all caused my BP and other things to go where the doc was concerned. I eventually get put on GLP-1 which reduced my weight and everything is almost normal, then my civilian insurance says no more, only prescribed if you have had heart attack, stroke or other significant medical emergency, thankfully Tricare is picking it up. I am pretty sure a shot or pill to help people avoid those bad life events would be cheaper than paying for GLP-1, not sure how much an ER hospitalization for a heart attack actually cost but I am sure it is a big amount.