Most of my friends who've held postdoctoral fellowships say they are the worst experience they've ever had! They'd heard what to expect (and expected the worst) well in advance from all their friends, peers who were a bit further along, and faculty mentors. It is hard to believe no one advised you about this, and that is to their discredit.
On the other hand, these positions are apprenticeships in many ways and typically expect one to have jack-of-all-trades skills. This is annoying but also valuable, since you have to do most of that stuff as a professor or clinician, and it looks good on your vita as you seek a teaching job. You should begin to test the waters in that direction before too long.
In fact, my peers say beware of getting stuck in "postdoc hell," since after four to five years potential employers may wonder why you haven't gotten a "real job," and you may have a hard time getting out, and get stuck in an endless cycle of poorly paid, soft-money jobs. I'm sure I've seen columns on this in The Chronicle; you should look in the archives. While postdocs are great in many ways, I still can't believe you were not warned about what a postdoc would require of you and what conditions you'd probably work under; your advisers should be ashamed of themselves.
But on another note, why on earth would you begrudge your full-professor colleagues anything? Since you clearly, and understandably, want to live in a mansion and swan around the world too, living the life of the mind as do most academics, I would suggest emulating these people rather than putting them down. Senior faculty members who are well-placed after many decades of work (none of them lived in mansions as assistant professors!) usually deserve their rewards, as does anyone, theoretically, who lives under our economic-ideological system in the United States. Would a newly minted stock broker begrudge a Wall Street tycoon his big bucks? No; s/he might be jealous of him or her, but not grudging -- after all, s/he wants to join the club!
Are assistant, associate, or full professors supposed to turn down salary increases or other perks that go with seniority and ask the administration to donate them to charity, or save the institution money by turning down a merit raise and request that the institution re-invest the money in new library books? Would any typical person in any profession or job anywhere do this? What is bugging you is that you are looking at a long road to join these folks, and that is true. Anyone who thinks that work ends or slows down upon conferral of a doctorate is poorly informed. During graduate school you should have gotten an inkling of this, and I'm sure you did. The workload and expectations only get ramped up after you land a job.
Of course a few undeserving people succeed too, which means they may not be very good scholars but they are clever in other ways. In the US, this is not an unusual strategy either, is it?
If I were you, I would eventually hint to your full-professor colleagues that you have suddenly realized that teaching your own grad students, in order to pass on the invaluable skills your own professors generously taught you, is your true calling, and that you wish to find a position where fewer "hats" are required so that you may focus on becoming a great mentor/teacher/researcher. Tell them that they inspired you through their exemplary careers, and ask them to support you in your search for an academic job. They won't be surprised; many postdoc positions are "practice" for professorships, not only clinical careers, etc., and I'm sure they've heard it all before. Once you get the job, be prepared to bust your butt for about 15 years in order to get the key to the mansion gates.