I've had good and bad meals in D1 and in Y, TATL and TPAC. I also have pretty simple expectations when it comes to food on a plane. It's not going to be Arzak or French Laundry.
I generally tend to opt for cold meals if available since I, like most, feel like the ovens and/or FAs tend to be very inconsistent with D1 heated meals.
Overall, I've never had a completely inedible meal on DL. I have on a few other carriers like MU and UA.