Yeah I could see that. Dude might need a retaining wall. Hard to say without understanding the soil around there.

I'm most familiar and by default think about the soil around home, thick Houston black gumbo. Clayey and dense, sticks to everything and holds stuff pretty well in general. Ideal type A example imo.

Type B or C yeah I could see that being iffy. I'd try drilling in post holes and filling them and connecting it to the footing or something I guess.