Yup, this is what I encounter on long haul UA.
Terrible attitudes, sarcasm, condescension. Bad food. Broken promises. It's the "Dick's Last Resort" of the skies.
And then you will have a good experience. And then 2 bad ones.
It's like the gate agent at the premier counter who checked me in yesterday. Didn't greet me, or thank me, or do anything. Terrible service. I got better service flying economy on other airlines.