How to Unlock Jiren’s Default Ending
After choosing to intervene with Kale, you need to work your way towards the Ultimate Climactic Battle episode. The opponents for this fight are Frieza, Android 17, and Goku.
Your main objective is to survive against these guys. There is no need to defeat them.
Unfortunately, being defeated by them does not lead to an ending. You shouldn’t feel bad if they do keep beating you up—all three are strong with a lot of health and projectile supers that they love to throw out. Lowering the difficulty is a fine option, since that doesn’t prevent you from completing a main objective.
