I cannot say anything about Hive since I don't use it. But whenever wax was brittle or breaking, it was because it was applied to thin, or not pressed down enough to grab the hairs at their full length (which is very annoying for you and painful for the client) or it was just too dry.
Like others already said, I don't have that problem since I started using Perron Rigot, and it's much more easy to use, it removes all, including short or stubborn hairs. Other geeks will mention other waxes, like Berins, which I did not try, but people also swear by it. The better the wax is, the easier it is for you and gentler on the client.
Recapitulate what have you been doing at the exact moment, try it out a bit on your legs or arms, and then on the curved body parts, like inner thy, and practice, see how long it needs to set so it doesn't break and how thick it optimally has to be.