Overstimulated baby

Just needed to rant a bit.

So my baby is a few weeks old and my parents keep overstimulating him in the night which results in him sleeping really late around 4-5am. On the days they don't "talk" or "play" with him after 10pm he sleeps at around 12-2am.

I've spoken to my parents about it but they think I'm talking nonsense and their reply is "babies sleep when they want, there's no such thing as overstimulating them".

It's annoying because as parents they think they know best but I've told them he's my baby and I'm a parent too, I know what's best for him and I've noticed the patterns. They're so disrespectful to me and disregard anything I have to say about my own baby.

It's fine for them as they head up to bed and I'm left having to calm and soothe my overstimulated baby which can be tiring especially on so little sleep myself.

I would've moved out if it wasn't due to financial reasons - grr!

Anyone else dealt with or having to deal with family members or friends overstimulating baby?