@glorydaz I'm not sure you can buy ACA coverage if coverage is available through your employer; you might have to have NO option through your employer to be eligible for coverage. Check the Marketplace website and you will find explanation of eligibility to buy coverage.
You can always check with an insurance broker to see about buying privately. There are policies you can purchase that are neither ACA nor employer-sponsored....but I honestly don't know if they would offer better coverage or lower premiums. You could tell a broker what your current policy costs & covers, and ask them to compare to other products to find out if you can do better. Depending on your situation, you could also investigate whether there is group coverage available through a co-op arrangement affiliated with your church/religious group. Since you're already laying out nearly $11,000 in annual premiums alone, and would still have to satisfy a deductible before coverage kicks in, look at your overall cost as a baseline for comparison. You can also look at HMO vs PPO plans, if you're willing to stay within a specific network or obtain pre-approvals in exchange for less overall OOP.
It seems like 2024 insurance costs have shot through the roof, AND coverage is generally not nearly as comprehensive. I guess that's where an HSA or FSA would help to fill the gap. I'm a retiree now on Medicare + a supplemental policy; prior to that I had employer-sponsored coverage, then a couple years of ACA coverage after early retirement. HSA's were a newer thing, so I'm not familiar with how all that works...but I would definitely look into it if I was in your situation. Good luck!