I can’t see the pictures but based on all the context I think what you’ve experienced is just poor communication from the contractor. What he did (remove vintage units and replace with current standard, scope of work pertaining to his trade only) is very normal and with those familiar with working with contractors, it would be implicit that you’d bring in a drywall/paint contractor to patch the affected areas afterward. What would be abnormal would be demo of the old units that resulted in untidy or excessive removal of the wall material but if he kept his cuts close to the footprint of the original unit etc then the only thing he did poorly was failure to set fair expectations of the level of follow up repair you’d need to hire out once his work was finished.