I understand your feelings and the shame that comes with them.
I have two half siblings, one I share my mum the other I share my Dad.
One sibling has been bought a house, outright, by her Dad. Following this, all my siblings children have been bought new cars and houses.
My other sibling has been gifted a large (and a mean the majority of the mortgage) deposit to buy a beautiful house by her partners parents.
Both my siblings live very comfortably, secure that they have very secure beautiful homes with their children’s future bright and without financial hardship. Me and my DH work our absolute cocks off- we earn decent money but we are unfortunately the paupers of the family having to say no to expensive/extravagant family holidays (that our very young nieces and nephews can easily afford as they are also mortgage free) because we simply can’t afford it.
We are an incredibly close family and I and am absolutely disgusted in the jealousy/envy I feel. We have never been gifted a penny, which is fine, but it’s so hard when everyone around us is so well off without having to work so bloody hard for it. I try my best not to be bitter, and I hope to god my siblings never recognise it as it’s not their fault. It’s something I’m very ashamed of.
I suppose the point of all that is to say I get it, but try and put it to the back of your mind because nothing will change.