Spades!! said "I’m living in a family and pet friendly apartment block. It has been really nice until a family moved into the apartment above me. They are quiet all day. At 11:30 at night they start to put the kids to bed, Dad is yelling or talking loudly, kids are screaming.
I know it’s the reality of living in an apartment but is there anything I can do besides get ear plugs? Do I have the right to complain? "
You pay rent, you have the right to complain. The LL has a duty to enforce the rules and provide you with a reasonably safe and reasonably quiet living space.
Does your building have a super or caretaker? They should be able to handle the problem without ratting you out.