I've been doing this for a long time now... I've learned to appreciate the work I have, as maddening as it is..
Story goes....back when my company first got into continuous form printing, and first got the nexpress(2006-ish), there was ALWAYS a crazed Friday at 5pm rush to get signoffs out to clients. I was the guy that got them all running.... Basically If we get approval sooner, we can start sooner, thereby avoiding OT for production. Well after about 3 months of 12 hr days 7days a week...and having a brand new baby at home... I kinda flipped (sorta like you are right now). Had a "meeting" with the director. I asked "is the nonsense ever going to stop?" (add in some profanity) He says "probably not" LOL "there are tons of other printing companies out there with close or even better pricing, but I WILL NOT lose business due to lack of customer service, and nobody does what we can do" then said...if you need a break...take one. just don't leave us hangin.
Ive been "all in" ever since.
then, I was handed the igen (no training) on a whim. It was a few months of hell. thankfully I had you guys(big hug) , and I already have good rapport with technicians.

Plus years of experience with Xerox and Kodak equipment... Took awhile, but i'm pretty confident with Igen now... I can do whatever it takes and then some. I get handed jobs with layouts for other equipment and regularly have to turn them same day. I call that "putting out fires" its better than telling an already upset client we arent going to make their maildate because the B&W's ran outta stock.
I try to take pride in what I can do. It helps get through the day and stay motivated. But when its time to not do printing, I play hard too. My brain usually hurts after a day of printing. I saw beer mentioned....that helps.
good luck to you.