Running on Fumes

I've been hesitant about writing a work-related post of late because I don't want to appear like the whinny, ungrateful type. But I think I am fast-approaching the tip of my patience iceberg.
I've said many times that I am up for the challenge of an operations position. It's been something I've always wanted to do, to get some experience in, to learn from. But I think the saying "be careful what you wish for" could not be more apt to my situation right now.
My account is a production account. When I first heard that I thought, OK, numbers. But I never dreamed it would be the white collar equivalent to a blue collar job. I can count the weeks since March when I didn't render more than 1 hour overtime. I don't mind but almost every week for almost 4 months now? I think it's too much. I rarely get to see my kids because I get home super tired and wake up late, just in time to go to work. Half of the weekend is spent recovering from the exhausting week. I've tried to comfort myself by saying that's the way it is with an operations start-up account, but almost everyone I've asked has said this is abnormal and too much. I am stretched. And even if it isn't because of disillusionment, lack of appreciation, being maligned, it is still exhausting and I am getting fed up.
Will I ever find a job I can love? I don't expect perfection, just a balance of work fulfillment and a personal life. Is that too much to ask for?