Steve, yes. I've had dogs all my life, including a Black Lab from a pup until he passed at 8 years old. Its difficult in the fact that I work full time, and the missus works 3 days a week. We also have two young children. I agree he isn't really to blame, I know he still requires a lot of training and attention. The breed is known for its very lively nature, especially up until around 3 years old. And as I'd already mentioned, he gets two good walks a day. Labs are also known for having anxiety and separation issues too. Which obviously doesn't help. I'm not claiming to know everything about raising a dog because I've had one in the past, I've also read a lot of articles and subscribed to a few lab/retriever specific websites for guidance on what the best ways to train, and deter this behaviour is. This is what I'd recommend for anyone thinking about getting a dog.
That said, its still a massive undertaking and as you can imagine, at times you get very frustrated.
Peace out.