I don't have any troubles at all with my part time with RGGH when I use the shoulder strap (either crossbody or on the shoulder). I does bother me a little when I carry it by the hand or when the handles are on my sboulder.
In comparison to rh bags, it is definitely heavier, but when I compare it to non-Balenciaga bags, they are about equal because the leather on other brands is so much heavier.