Exactly as you have done, very low contact.
It’s like my children belong to someone else’s for my parents. Yet me sisters kids are doted on.
My son once commented that my mother’s house is like a shrine to my niece with multiple pictures of her on walls, side boards, on my mums keys, in photo frames all over the house.
He never commented on the lack of even one of him or his sibling.
I take my mum shopping about once a week and my son used to come too when he was little.
She would get to the till with piles of pink plastic crap piled up in her shopping trolley, nieces favourite biscuits, crisps, drinks, meals, toys (for birthday/Christmas apparently).
Never even a 99p Easter egg for my little son at Easter but at least 4 for my niece.
She still does it now but for my now grown up nieces kids.
Yep, hurtful but what can you do?
According to MN, the replies will now be about how grabby and entitled I am as I have posted about this before and was ripped limb from limb.