Low flow, to me, means that less water gets through it, and it takes longer to rinse of, using just as much water as the non-low flow shower heads.
You seem determined to be miserable.
I have my choice of shower heads, including all the old ones that anyone could want, taken from all kinds of homes (and scrapped), and I have fine showers with my normal low flow shower heads, and have for decades.
Good luck with your misery, you sure work hard enough to maintain it.