I am as puzzled as you, especially if the taste is as bad as you say. There is one industry that has already been focusing on making "healthy" stuff taste good

I am as puzzled as you, especially if the taste is as bad as you say. There is one industry that has already been focusing on making "healthy" stuff taste good for the past decades: the fitness industry. Why not just go for a good old protein shake? Or a protein bar? It costs almost nothing (except maybe the protein bars, which are comparable in price to soylent ones) and are nutritious enough.