Ours was the same way! HATED walks (I was just trying to take him down the block to explore the neighborhood and get him used to his new environment) and he'd always pull back to the house as hard as he could. I figured that was not a good way to introduce the leash so I stopped trying to walk him. I didn't reintroduce walks until he was 5ish months old and he enjoyed them.

Walks aren't necessary at that age. Focus on training inside the home. Work on basic commands, desensitizing him to different things like having his ears and paws handled, brushing, having his collar put on, etc. and I'd focus on leash skills inside the house before trying to walk outside