My point was that Cunard IS NOT a good fit for their requirements.
The OP wants casual, I think there are those out there who are still upset that a Tux is not required every evening in the MDR. Even though the dress code was relaxed a few years ago the ships tend to the more formal. I mentioned Oceania since it tends to Country Club Casual. I am sure some of the other lines: Seabourn, Viking, Regent may have a less formal environment. I just have not traveled them.
The OP says they are MAJOR foodies. Pre-COVID (not sure it is still true these days) the food in the MDR on QM2 was OK, similar to Princess cruise lines, maybe a little better then Royal.
This is significantly below what you can get on the other more expensive cruise lines. I have not traveled in Grills so that may be significantly better however, the OP was not willing to pay the additional.
All is all, the OP on Cunard may be a square peg in a round hole.