I find it interesting, so here are some thoughts, specifically the following:

Beta men still procreate. They will obtain tampered leftovers and with these inject themselves into the gene pool.

I assume its due to the men removing a woman, as of finding out they are promiscuous.

This repeats and at some point the product will devolve so much in value, it matches the register of the beta.

But the big issue here is. The dominant man only tampered the woman. He may never fully procreate.

While the beta does+ with some degraded edges on the outcome.

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The odd thing is:

Its not the beta suddenly turning, starting an Inferno of rape - out of spite…

Its is the woman who initiates the beta offspring.

Hence in the end, the dominant male has a diminished share. Notably which shrinks -divided- per generation each.

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The question arises, what nu ?

I draw from cannabis cultivation.

Usually one removes un-desired plants so they wont pollinate another.

This saves the next generation.

The authority should apply this, but democracy itself has it as fierce enemy.

So to end it quick, you wont get rid of de-volution until you get rid of democracy. Because it prevents normal biological advance.