Never understood why people are buying bottled water at airports. I always bring a large empty water bottle, and fill it up at the drinking fountains that are invariably on the other side of security, or near my gate. They pretty much always have those touchless bottle filler things on them now. Seems pretty painless.
Not the best tasting water, but in the states I'm reasonably confident airport tap water probably isn't dangerous.
yes you paid for a flight, and the airline is using that to pay for the basic airport fees. most of your gripes could be avoided by paying the airport as well for extras (e.g. to use their VIP lounges)
Even flying coach is like a luxury for me. I'm giddy during all the flight and flirt with the flight attendants. ;)