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Armed with that, instead of accepting and complaining about my situation, I worked my ass off to change it. And I did. By a lot. When I had kids, I tried to teach them the same thing. '"She made me sooooo mad" -- no, you are mad because you. Yes, your sister should not have pushed you. Yes, it is also on you to control your emotions. Let's go talk with your sister about pushing you.'
I expect there will be people who downvote this. Keep looking for others to blame and see how that works out. Take responsibility. Fix a thing.
This also leads to another of my early discoveries (also, under 10): if you can't do something about a situation, don't -- and don't worry. If you can, do -- and don't worry.
These have served me well, even if "wrong."