Atreus does have the home advantage, and like Goku, he also has experience fighting opponents who come in all shapes and sizes, have differing abilities, and have skills in melee and/or range (like trolls, travellers, revenants, draugr, and dark elves just to name a few), Atreus is also smarter, and has elemental variety (he can electrocute Goku with his shock arrows, or stun him with his light arrows), he can also use various summons that could overwhelm him as well.