Boeing pilots think because controls are linked both pilots can make control inputs at the same tme, the stronger one wins. That should never be the case, one pilot flying, one pilot monitoring.
On the Airbus, the other pilot can isolate their control a any time, and should say, I have control control to make it clear the roles of each crew member.
The captain failed simple CRM 101, I have control, to tell the FO of his changed role. If that does not work, hit the priority push button and isolate his inputs.