I really feel for you. I am also at the end of my tether with Cunard for various reasons relating to my need for an accessible cabin. One reason being that last year, we and our travel agent spent many days attempting to book accessible cabins, to then find out, that 'owing to Covid', Cunard had removed all from sale and not bothered to update the website to inform affected customers of this. The majority of crew onboard are exemplary, but I have experienced too many occasions now when I have been treated dreadfully, including being told (not asked if I could) by the maitre d that I would need to get out of my wheelchair to sit at my reserved QG table - if only I could. And many other examples.
We tried Celebrity last year and found them very good with ships easy to navigate. I will probably cash in all my Cunard FCC and FCD in the next few months as the uncertainty with Cunard is too much to bear when we should be able to look forward to holidays without Cunard cancelling them for reasons that are completely in their control.