Much of this is an antitrust problem.
The inputs to farming, especially seeds, fertilizer and machinery, are controlled by monopolies and near-monopolies. There have been too many mergers.
On the sell side, there's monopsony or near-monopsony, with very few big buyers.[1] Farmers are caught in the middle, with little pricing power on either side.
There's not much question about this. There are antitrust cases, but with weak penalties and weak enforcement.
[1] https://equitablegrowth.org/competitive-edge-big-ags-monopso...
No, much of this is a political issue. America wants food standards that are different from many trading partners; fair enough. But it makes it impossible to export many farm goods as a result. This is outside of the current political climate, and has been going on for ages. It's just coming it a head now.