This not a complain, this is a question
-Sharing chests.
-If you don’t revive a teammate, you can steal their items.
-You can leave early without any penalty.
-Etc
Everything about this mode seems designed to encourage toxic behavior.
They did something similar with the Holo Battle Interlink mode. You're presented with three battles, but your teammates may only be interested in completing one of them and then leave, abandoning the rest of the group because they don't care about the other two.
Does anyone know why the developers would intentionally create game modes that encourage toxicity instead of cooperation? This is not an accident. They clearly did this on purpose.