Yeah I've never had issue landing a small ship in the game, hell I even got a 'Conda in a crystalline shard valley before. For whatever reason I could only get the DBX half a km. from the site at Synuefe EU-Q C21-10 A 3. It's close enough that most missiles can be shot by point defense, but not all. What makes no sense is I'm looking at landing sites that are just as flat if not flatter than the spots that allow me to land. It feels broken, not an intentional mechanic.
[EDIT]: Finally got it near that leftmost pylon, but it was much more sensitive than most sites. Guess it's just these high elevation locations. I'm also an idiot, didn't have pips in weapons hence the point defense not getting all the missiles.