The Tree father enjoyed more defeats than victory in his fights throughout the realm. He suffered a lot of losses because, despite all his advantages, he was also at a massive energy disadvantage.
The Zargoth plane is one of the few planes that the divine plane has helped him to form a dominion. He could corner the Origin gods in the Zargoth plane because of his dominion. But there aren't dominions for him in other planes so his avatars died under the relentless assault of immortals.
Origin gods used their immortality to the fullest advantage. They rampaged all over the realm of high heaven in a bid to gather resources and manpower. So despite the presence of a powerful Celestial in a plane to stop them, they still won.
Some races fell and were enslaved throughout the realm. They lost control of their plane because of war. Meanwhile, some other strong races like the battle sage monkeys didn't even feel the chaos caused by war. Their lives continued the same.
