Are you sure that you don't want to change your screen name to Mr. Debbie Downer?

I'm mostly kidding, but there are "solutions" to your frustrations with little effort.
First, as has been mentioned by others, many here who retire early rely on ACA subsidies to make health insurance more affordable until they are eligible for Medicare at age 65. They manage their income to get certain levels of subsidies toward health insurance.
SEPP aka 72t plans allow you to access retirement savings before 59-1/2 if needed but since you have $750k saved outside taxable accounts to get you to 59-1/2 in ~4 years you shouldn't need a SEPP/72t unless you're living really high on the hog.
You seem to fear capital gains but have you really studied it? For a married couple under 65 in 2025 they could have up to $30,000 in ordinary income and up to $96,700 in a combination of qualified dividends and LTCG and pay $0 in federal income taxes! That's $126,700 of total income and $0 income taxes... I love America!

And that's gains... so the proceeds from sale which could be used for spending would likely be much higher. So why the fear?
The key input that you haven't disclosed is how much you need to live on in retirement. However, according to FIRECalc if one had $3 million and a 45 year time horizon (from 55 to 100) and a 60/40 AA (not sure what yours is) you could withdraw as much as $106k a year with 95% success ($101k for 99% success rate). And that doesn't even consider what you will be receiving from your federal pension and/or social security!
It's really unclear to me what you are complaining about. You have the world by the gonads and could probably retire now if you really wanted to. Stop complaining and start thinking!