I think, after reading ALL of it and not just half of it, he regrets working too much but he is nonetheless happy that he accomplished so much by working. Ther

I think, after reading ALL of it and not just half of it, he regrets working too much but he is nonetheless happy that he accomplished so much by working. There is a clear distinction and he makes it clear he wishes he didn't work so much towards the end. I think his "work regrets" are more like feeling disappointed in letting others down at a critical time (he takes his working relationships very seriously, too).