Is it "quitting" (and therefore less than honorable) to get out of a difficult situation just because it is difficult?

I have given the new ownership of the bank a little better than a year. I'm still working more hours than I want to on an impossible to predict schedule and doing things that I don't enjoy.

I think it's time to move on. But a snaky little voice in the back of my mind whispers that I'm being a quitter.

What do you think?

(And before you give me the lecture. My boss and his boss know how I feel.)

GHR