Disrespectful kids everywhere

I've seen so many disrespectful kids from all ages, they throw tantrums when things don't go their way and they are so disrespectful to their parents to the extent of cussing them.

I don't think its okay for a kid to behave that way, no parent should go through raising a child and caring for them just so they can grow up and treat them like shit, what do you think is the issue that causes this? Is that kids see that their parents treat each other that way? Is it spoiling them? Is it because they don't discipline their kids? Or is it just simply because parents are ill mannered and it's no surprise that their kids will turn out like them.

I've seen a child call her mom a bitch! Like seriously! What's wrong with this generation!