If you work for a company with 10,000 employees or more and don't have a gold-plated health plan then it is by deliberate effort on the part of the company to save money.
At that level a company that wants a good plan can demand no exclusions for pre-existing conditions (an issue prior to ACA), same-day partner additions, better drug tiers, lower copays, etc. Often they pay less per person than a 1,000 person company does for a much worse plan.
I know because I looked. Two employers ago we got acquired by a very large company (over 80k employees). They paid ~$800/mo for my family. When I moved to a startup, they were paying ~$1200/mo and the benefits were worse. I'm back at a large company again and it's back to ~900/mo for a better plan.
You are getting screwed because the company has decided to do so.