Apologies for the old pic, not got anymore recent ones. Circa 10 years old this is now (on a bullit, my first DH bike). The drop is still there but its now more natural and made of rocks;
This was a nice fast(ish) flowing drop.
You need to make sure the landing is steep enough for the size of drop you are doing. Its hard to tell how steep the landings are on your photos. The bigger the drop the steeper the downslope required.
As said above make sure the run in is reasonable as if not you’ll just keep bottling it.
There’s a few reasons why your backyard drops aren’t ‘flowing’…..
Look at the angle of the take off ramp, its bordering on a jump, the landing then is only a few feet past the lip of the drop off.
So I imagine your going up a take off ramp slowly so you don’t overshoot the landing, then awkwardly dropping in on the downslope. To make that smooth the landing would need to be another 10ft or so further out and then hit it with speed.
Looks a nice spot, I love nice natural rock drops 😀