A large amount of motivation behind what trump and his cronies do is predicated on the idea of "owning the libs". Our society has reached the point of polarization where, for some folks, if something is supported by the opposing side, that must mean its bad and should be destroyed.
Another rule along the same line is that the duck stamp program just had rules pass that require its stamps to show some aspect of hunting, a requirement that never existed before and which seems to solely exist to annoy the various birders/naturalists who buy the stamps to support conservation, without being a hunters. Prior stamps usually just had pictures of ducks, hardly controversial imagery. They are literally turning away money just spite conservationists, even as hunting overall is in decline in the country.
The last four years have seen this crop up again and again, fed by an anti-government mentality that the republicans have been inoculating for years into there voter base. Hell some of these measures are not even supported by the industries that Trump is claiming to help, with both the vehicle industry and food industry believing that rolling back some of these rules caused more chaos than good, especially if they just get put back in place after Trump leaves.