No, not really. Certainly not as adults and as children being the oldest makes it hard for your siblings to bully you, at least before they're as big as you.
There's times I think my youngest brother might if he was immature enough to feel it was acceptable. I was enough older to have been really looked up to at some point and we're both old enough to realize that I've never been a particularly good role model.
At times I was a bully towards my middle brother. It's one of the things in life I feel the most guilt over.
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The Party told you to reject the evidence of your eyes and ears. It was their final, most essential command.
They have a name for Nazis that were only Nazis because of economic anxiety or similar issues. They're called Nazis.