bad, I have to agree with a few of longmeadows points,
some plows are very difficult to use, not all plows were created equal, the land you are plowing. the cover crop all makes a big difference.
cleaning up the wings will help some, but the points must be in good shape or the old plow will not go in the ground,
if the points are in good shape, the old plow should just suck itself into the ground and you will have to use the tractor draft control to hold it up at the desired depth.
I have a set of 3x12" Ferguson MF62 plows, they have new points, new coulters, but they would give me a fit trying to turn that heavy grass in your pictures. Now after its turned and you plant a crop on it, next year, it would do a great job plowing the ground with less debris.
I tried a set of Ford 101 2x14 plows that were in good shape, they are a better plow in my opinion, that did a good job in the same field my Ferguson plows were having a fit trying to turn.
I solved my plowing problem, I bought this old set of Massey Ferguson disc plows, they do not care about the ground cover, they back up from nothing, will flip the dirt, roll over roots, whatever, the ground will be left rougher, but they will plow, grass, stalks and do not clog up much,
good luck,
just keep working at it, plow it best you can, disc it down, then plow it again, may have to go over it a few times, as you said its been years since it was turned,
but you will get it,
plant your garden or whatever, you will be surprised how much easier it will turn over next year.