No worries.
Yeah, I'm sometimes dissatisfied with my work, however I think most people probably are from time to time if they're honest about it. I generally like my job but there's complexities sometimes and aspects that I don't enjoy...but they pay me to do the job and I'll always do the best I can. You?
Even though the pay is very bad, I continue to do the best I can because I really like it, but sometimes I think if I should have chosen another profession because a teacher is not valued as she should be or maybe I am frustrated.
It speaks highly of your character that you continue to deliver your best efforts. Well done.