LOL Colleen! I've seen lots of kids from wonderful homes with wonderful parents that are really brats. At the same time I'm seen kids from home of the Poor and rejected that are the best kids you'd ever want. So what's the answer?
Do the best you can with what you've got, teach them how to say PLEASE and THANK YOU instead of F*** you, and always remember that these kids DO listen to what you say. What I mean by that is if you use the F word, etc. they will too, nine times out of ten! My son-in-law uses the word like it was HIS! His daughter (my beautiful granddaughter) uses it the same way. I HATE it. My late daughter didn't like it either.