Having a ghoulish interest in watching Youtube videos of failed landings, as the OP describes, I came to the conclusion that a lot of these troubles (when not caused by unstable approaches) may be a function of differing grass-lengths and the state of the field. As any glider-pilot will tell you, the difference in landing-distance and between landing in "long grass" to "short grass" is pretty startling, and of course "long" grass can hide all manner of 'orrible ruts and whatnot which can really make the final landing roll a thing of elegance and judgement - if you miss them - or a wince-inducing "arrival" if not.
As effectively you're always landing in "long grass" with a reduced scale aircraft, it stands to reason that warbirds will generally not touch down without frequently nosing over, removing the undercart or otherwise bouncing back airborne at an embarrassingly low IAS; unless the field is both really level, and more like a golfing green than a fairway, IYSWIM.
I'm not an RC pilot yet, but am I on the right-lines here?