Buddha said, "What we think, we become."
Marcus Aurelius put it this way: "Our life is what our thoughts make it."
In other words, events are neutral. The thoughts referred to above are the memes you bring to the table and apply to the situation. You are the holder of the memes. You construct your apprehension of reality through the memes already in your meme bundle.
In Hamlet Shakespeare said, "For there is nothing good or bad, but that thinking makes it so."
Can you trade your pessimism meme bundle for an optimistic bundle? Would you want to if you could? Can you trade your current attachment to frustration and indignation for acceptance of the here and now and peace?
Epictetus suggested this simple course in order to achieve just that: