I can tell you with absolute certainty that this avoidance and lack of affection is not "just the puppy's temperment!". As others have said GSDs typically like to be around you without a lot of interaction.
You asked for advice, and people have given you, pretty consistently, the same advice. The training and the constant, and likely from your puppy's perspective overwhelming, interaction ARE the problem! But hey, what you do with that information is ENTIRELY up to you! Good luck, and let us know how things work out!This is our 4th dog and we’ve never experienced this. It might just be her temperament. The environment couldn’t be more comfortable for her. Maybe too comfortable? She is never left alone and is always interacting with us. I don’t think it’s the training or lack of interaction.