I think you did the right thing re-homing Chubbs, sometimes things just don't work out no matter how hard we try or want it to

Nothing says it will be the same if you get another dog... the chances are it will go great cos now you know how things can go wrong
I have a house full of dog issues so you are not alone having problems. I do think many of Cesar's methods works but it's not for every person or every dog, we're all different and a person who's scared wont be able to pull of what he's doing. Also, even Cesar has said bulldogs are very difficult