Kenmore 106.56692501 Freezer is cooling fine, but fridge won't cool

I took apart the air flow duct parts to get a better look at what’s happening. Referring to the attached picture, the air comes up from the evaporator fan, through some plastic ducting, and into the fridge side through an air damper and into the back where it comes out the vents. The airflow from those vents feels very week.

So far I’ve already tried replacing the air damper; the first time I looked at it, the vents were closed, and if I moved them manually they would not automatically switch back. Seemed to work okay but only partially.

Couple months later now, same issue. I looked at the evaporator fan and it seems to be running just fine, and cool air goes up through the freezer ducts just fine, if I hold the air scoop in place to by where it would normally connect to the air damper, cool air flows freely into the fridge. Another thing I noticed is that the air coming into the fridge is reduced by a lot when I close the freezer door.

If anyone has more suggestions of what to check, I’m capable of using a multimeter and digging parts out, just need a point in the right direction.