It was a complaint about 25 years ago when the first iteration came out. There was a full King of the Hill episode about it. Since then they refined the low flow toilets to be as good as the older style.
https://m.youtube.com/watch?v=J4f0MeoV5pQ&pp=ygUga2luZyBvZiB0aGUgaGlsbCBsb3cgZmxvdyB0b2lsZXQ%3D
Banning the soy sauce packets would force a mindset change. A new solution would be restaurants having the full size bottles and when you pick up, you can bring a Tupperware to fill.