Well, supposedly, the next step is suing them ? This of course still requires some power and influence, but if the violation is egregious enough you generally can find a rights defence association willing to help you.
(Of course the DMCA is still problematic for grey areas and spurious claims, like here.)
One can sue, but it won't resolve the problem of double standards. As far as I know, you can't sue google for automatically acting on DMCA claims when they are sent by certain people of power and influence and leaving all other claims to the courts.
(Of course the DMCA is still problematic for grey areas and spurious claims, like here.)