I haven't been here long, so my sample size is small. I ask every Captain I fly with if they regret being here or wish they were somewhere else. Not a single one has said they'd rather be flying for someone else. Sure, they say at their beach house, or skiing, or retired, but not working at another place.
There are crappy things about the job, sure, FTv3 mentioned a lot of them.
I'm enjoying my time here. YMMV.
Blue skies and good luck to the people who want to get here!