When I took it apart to refinish the stock and tried to put it back together, the screws just disintegrated. That's another well known issue with the new Marlins...
I have heard of this before, but from the picture those screws appear to have received a LOT of torque, which would destroy the threads. From experience, I know that it is critical to ensure that the screws and fore end cap line up with the fore end hanger precisely, such that they will screw in with only finger tip pressure.
Often the factory has installed a slightly over-length fore end in place and then somehow gotten the screws in place. They want the fore end not to be loose obviously.
Perhaps the wood has swollen afterward in a high humidity location which causes those screws to be very difficult to remove. The solution is to carefully rasp, file, and sand the end of the fore end in a cut and try process such that the screws will enter easily and yet the fore end is not loose.
I removed the fore end on a .44 Magnum 1894 made in 2019 to inspect the end for roughness recently. Fortunately my location is pretty dry. After some cosmetic sanding, it was good to go.
While the screws were easy enough to remove, the fore end cap could not be reinstalled without trying to force the alignment of the cap by using the screws to pull it into alignment.
I knew that this would have damaged them, so I carefully filed and sanded the fore end in a cut and try process until everything lined up, and then applied some boiled linseed oil, and reassembled it.
Also, the fit of the fore end into the receiver is often snug, but a very nice fit.
Before reinstalling the fore end cap it helps to give the fore end a couple of careful raps with a rubber-tipped hammer, with it in position, in order to seat it in the receiver.