If your compost was not fully composted, it will be "robbing" the soil of nitrogen as it continues to compost.  You may need to apply nitrogen to counteract that. 

It also may be very acidic (though pine needles do not make soil acidic.)  The only way to know the condition of your soil is to do a soil test.  Do so now.  (This page tells how to do that and where to send the soil sample: https://extension.umd.edu/resource/soil-testing-and-soil-testing-labs)

As soon as you take the soil out for the soil test, apply nitrogen lightly and some lime now and work into the surrounding soil without disturbing the bean roots.  The nitrogen will dissolve quickly and be available to the beans.  Lime takes a long time to change pH. When you get your soil test results back, if it says to apply nitrogen and lime, just subtract the amount that you have already applied. 

Also study our page on growing beans, which including fertilizing recommendations: https://extension.umd.edu/resource/beans (The website has a page for each veggie crop.)

It is very early to plant beans, and you can easily replant. It may be easier all around to do the soil test, work in the lime and then plant, rather than try to save the yellowing unhealthy beans. 

Ellen