I actually think you got the best UA J flight possible. You slept, did not get disappointed by the food, drink, lack of anything but regular coffee, and the often desultorily service. Put another way, you got to miss all of the things we complain about UA for.

Sleep on an airplane is precious, you got it. That is better than I can say for recent flight in J on SQ, ANA, CX, VS, and DL, on none of them did I get a full night sleep. (but I got decent to great soft product when I was awake).