Why is Trump so intent on destroying environmental safeguards

I confess that I have never really understood Donald Trump and his administration and, in particular, their push to specifically negate any environmental advances that have been made in the last few decades.
The latest such move is to rescind a ban on GMO crops and insect-killing neonicotinoids in national wildlife refuges brought in by President Obama. Notice that this is not a general ban, but a ban in national wildlife refuges - you know those places that are designated as areas to protect wildlife.
Incomprehensibly, the Fish and Wildlife Service spokesman justified the move by the need to maximize farmland production in those NWRs that include some farmland in order to ensure adequate forage for ducks and geese, the favoured victims of hunters (hunting on public lands appears to be a particular priority of this administration). And all the science behind the initial ban done by the previous administration? Well, that's just science.
Other than a desire to encourage hunting (why?), the only other reason that I can see for a move like this and others, like the recent initiative to abandon Obama-era car fuel efficiency requirements (and even to stop progressive states like California from establishing their own fuel efficiency rules), is an almost pathological libertarian desire to do away with all (and I mean ALL) regulations of any kind, no matter how sensible and justified. Oh, and that other pathological imperative to undo anything that Obama built during his time.
I tell you, psychologists will have their work cut out for years to come analyzing the motivations and psychic underpinnings of this government.