Trust needs to be established first to ensure compliance. It's well documented that volunteer based activity leads to much improved prognosis than involuntary (kicking and screaming dragging along). Pain control is of utmost importance. You can't just 'suck it up buttercup' to all movement. There are only a very small handful of conditions where pain must be experienced in order to push through, and even then it simply can not be a traumatic pain that leaves you unable to function for days on end. You'll only create a greater nociceptive pain loop and sensitization of the tissues.
Cortisone may be an option you have to go through if it's that bad. It may be beyond physio at this point because of the incredible pain you have, and must be medically managed before you can break through and get real progress. There's no point beating a dead horse and I do not agree at all to just torturing for torture itself if it merits no physical improvement. You can't go through 10 treatments of zero subjective and objective improvement and not keep thinking "some day". It won't. There MUST be progress of some sort, and you MUST be referred back for medical management so that physio CAN work. Otherwise, this is not in your best interests and certainly not best practice principles.