I have been embroidering for a few years now. I have two Brother machines (from 4x4 to 6x10) and I have not had any problem. I'm trying to figure out what the problem might be. Have you tried different stabilizers, needles and different threads?
Some machines work better with different brands of both stabilizers and threads. I think you could pick one design and test it changing needles, threads and stabilizers and making notes on what works better for you.
Also, are you using embroidery needles or regular needles?
My two cents.