I am so very sorry to read your latest messages and to see how unhappy you are over your dentures. Of course, though it would be lovely to read only positive, cheerful success stories, everyone has different experiences and this site is all about being truthful and for every 100 or so success stories there are probably going to be one or two similar to yours. Statistically if every single person on this site posted a complete success story it would seem a bit fishy.
I can completely understand that if you are in pain, and you obviously are with the sore spots where the denture is rubbing, everything else becomes heightened and even the smallest thing becomes a drama.
As you know, I have been extremely lucky with absolutely no problems, except now, but that is 9 months+ down the line and I will have my new perms on 19th June. My problems now only because lower denture loose and fixative only keeps it in for about 3 hours at the most comfortably before I have to re-apply. So, though my pain is nothing like yours, I can understand to some extent.
It does seem, and your dentist more or less confirmed this, that your first denture was not as good a fit as it could have been. But, however good the dentist is with his impressions, and the denture maker in making the denture from those impressions is, it is really guesswork because impressions are taken from your teeth as they were. As soon as they are extracted, things have changed. To begin with your mouth is swollen from the extractions and then the gum starts to shrink so really it is an absolute miracle if the denture continues to fit perfectly. I think where your denture maker went wrong was in not anticipating some of the shrinkage so the denture would fit well for a while after the initial swelling had gone and your gums started the natural shrinking process. Your dentist should have been more accommodating in filing down, the acrylic (pink) part of the denture, of relining etc to make the first denture more comfortable. So I think he is definitely at fault there. I am wondering though, although he started the process of creating another denture for you, perhaps he is thinking this was too early on because your mouth still has an awful lot of changing to do and at this early stage, a new denture would still not fit tightly in a few weeks and need alterations and reliners.
I think what you really need to do is to make an appointment with him for a calm, face to fact talk and iron everything out and get an extensive written plan of exactly what he is going to do now for you and whether this second denture is still going to be classed as an immediate in replacement of the original and that he will still, when your gum has settled in a few more months, make the perfect permanent for you.
I do hope things get sorted and though I know it is difficlt, you must try and think more positively and believe that there is light at the end of the tunnel.