Fraid to say I think you sound more naive than you think. You fall to easily into the I've tried hard and had a decent life so I must yard stick to judge everyone else on.
What actually happens in real life is that a lot of these mouthy kids you talk about had parents who worked hard but they didn't have jobs that allowed them to be living a well off area like you. Some people have to be cleaners you know.
If anything you sound a bit judgemental. Sadly society doesn't do enough to help people out who have to work their arses of doing the jobs that none of us want to do (carers, cleaners, mums, etc) that don't pay big Bucks. Covid showed just how badly we treat service workers that are vital but low skilled.
Often people in these situations have trouble working and looking after kids and paying growing prices that don't match wages, and this leads to a lack of discipline and stress, especially from single parent households. Poor people don't make bad kids on purpose, the bad kids are a side effect of governments unwilling to help those who need it most, because were to easy to judge them as bad people, exactly like your doing. In some ways the dregs of society are owed a favour. Might make them less likely to be those people you hate.
Your assuming, even though you may not be doing it on purpose that because your alright, everyone else should be, without realising there are large amounts of reasons that life isn't all rosey for everyone.
Every layers of society is built on the backs of the ones below them. Your even worse if your judging people like that after having managed to escape such a life, if not then like I said, your just naive of what happens to those around you.