COBRA quote is huge, any alternatives? after 18 years as a warehouse supervisor

The COBRA quote for my family is $600 a month and I do not know how to afford it. This is my first time dealing with any of this. I saw that marketplace plans might cost less. How did you decide?

I priced both side by side: total yearly cost, doctors in network and the deductible. Marketplace was cheaper for us, but only because our doctors were covered.