It's not the breed mix that's the problem, it's the people who do the breeding of these dogs. Puppy mills and back yard breeders. While a lot of us have been taken in and bought a puppy from such places or pet stores which are supplied by these places, now that you're here, and you have one of these dogs you should know better in future to not purchase another in the same manner and create demand from these sources.
I take no offense in you defending your pup, I would however take offense if you try to justify the people who bred your pup or who sold you the pup.
In the meantime, you can learn a lot from this site on how to care for your pet, meet wonderful people to share stories with and of course, post lots of pics of your dog so we can all admire.