also note we are talking about a sibling
so chuck that diaper thing out the window

parent get special treament
but NOTE not all parents changed that diaper
and as for me not all parents decide to be there for you when it comes down to it
they make a choice
in turn you are actually free to also make a choice
it doesn't have to be hostile

you are working on the assumption that these people
a. were there for you
b. are there for you now
c. will be there for you in the future


this isn't always the case

and like i said family can and do take the familiar bond for granted
it doesn't hurt to review the above and look deep within regarding your relationships and try to work out something that works best for you as well as them

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When you are born, you cry, and the world rejoices. Live so that when you die, you rejoice, and the world cries.
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You cannot hate people for their own good.