I once had the opportunity to work on a special assignment in Mahwah, when the districts were able to send UPS subject matter experts to work on a new system. Personally, the reception most teams received were at best, lukewarm. Kind of had the feeling like, we can't contribute anything, because we weren't IS folks.
Well, after a few months, the mutual respect of the teams did successfully implement new systems in the districts and regions.
Which was a nice feeling getting back to the district and letting others know you were involved in a project, of which, unless you were ever on an assignment, you have no idea of the level of detail needed to make a new system work.
So are the negative comments here, due to job related stress or just hatred for UPS who provides for you and your families? I just don't get it, and won't say "quit if you don't like it".
Just make a decision in your life to make it as less stressful as you can. You and only you can make a decision that will impact your future. Life is just too short.