It ain't an excuse, it is the reason. I guess we could rig up some small gravel under the far edge to make the transition more level.
It is a "dry stack" wall. No mortar, and that is two full pickup truck loads of soil, and a bunch of compost and mulch to fill up the slope of the yard. We burried some concrete blocks and drove rods through them to help hold things in place. After three years, it sill is solid. Just that one brick is the transition from the curved sidewalk that the home builder put in.
When we first moved in I had to mow all of that flower garden area, and it was just grass. The area close to the house was the first to get converted to flower bad, and then the brick wall area was dug out , and we made it. We were too cheap to have a pro do it, so we did did it. We did have the pallet of stones delivered. It would take 10 or 15 trips in the El Camino to haul that heavy load.
This is after digging up the sod, and getting the yard sprinklers moved out from the garden area. We put in drip irrigation for the flower bed.
Early after the first planting before it grew much at all.