I have a GSD/Husky mix. First, Huskies are notorious escape artists. This doesn’t mean just finding ways to escape the house/yard, but it’s a super fun game for them to escape you as well. No amount of training is going to 100% overcome that natural desire. You can train them not to, but the second your eyes are off him, be prepared for him to run. I only allow mine off leash if we are hiking the desert in the winter (no one near), or when we run with the horses. These are the only two times I’m guaranteed a recall, because we are doing what he loves to do. Husky’s are stubborn, more stubborn than any breed I’ve had, and I’ve had A LOT. If they aren’t interested, good luck getting them there. They are dogs that want to please themselves over pleasing their owners, while GSD’s would rather please you than themselves. Mixing the two breeds doesn’t give you the traits you want out of both breeds. And Husky mentality normally is stronger than the GSD side.
I never correct Crios for taking off. It’s my fault, not his. He’s doing what is natural to him. Instead, I proof my house and yard to make sure he has no option to run. And we give him outlets that keep him mentally satisfied, like pulling sleds, carrying a weighted pack, agility (he so loves this). Basically I work with his natural preferences rather than trying to force him to be something else.
Long leads are great for teaching recall, so are e-collars if used correctly, but I wouldn’t ever rely on Crios’s recall to be completely off leash, with the two exceptions above.
Find a new trainer, the one you have is an idiot. I say that not judging you at all, but his methods. You want a balanced trainer that practices praise and corrections, not one over the other.