Legally, the Captain is responsible for everything.
There is nothing that can be mandated by Anna or any of the fleet offices that will change that. I try to give as much responsibility to FO's/SO's who are keen and willing and actually know their job.
Unfortunately, most of them have to be told to put their phone away as we taxi out to the runway.
Everyone is disillusioned with the company in some respect but have some professionalism and do your job well. That will lead to the respect you seek.