Assume that everything, absolutely everything is your responsibility.
When something breaks, it’s up to you to fix it.
When a customer complains, it’s up to you to turn their frown into a smile.
When the business is in a downward spiral, it’s up to you to change that.
When the team becomes dysfunctional, it’s up to you to improve the relationships between the members.
This is an exaggeration, of course. Everything in a team should be the responsibility of the team. But when you approach everything from this perspective, not only will your own attitude shift, but your teammates will inevitably start assuming more responsibility.
It’s up to you.