Your greens use up a lot of nitrogen, so it’s possible that you need some sort of fertilizer. If you check out the local extension service, they can assist you with a soil analysis to see what additives you need.
I use raised beds too. I plant cover crops in the fall to plow under in spring and add compost each spring before planting. It also helps to rotate your plants and not plant the same thing in the same space year after year.
Our Extension Service quit doing soil tests a couple of years ago for non-commercial growers. Now, they just give a hand-out with contact info for a bare handful of commercial labs, which start their charges at $50 plus shipping, and go up rapidly from there.
You are going to have to help a city boy out here who loves to get in the dirt, but doesn’t know what he is doing.
What is an ‘extension service’? I did Google it and we have a “Texas Agrilife Extension Services” a few blocks away. Is that the same thing you are talking about?