[ataru]

I don't know the answer, but here's some of my thoughts:

Identify the things you can help with, and the things you can't. Reserve your energy for the best opportunities to make a difference.

Also, you could do your own personal project for a while. I did some of those and realised that I'm almost 100% happy with the personal project, and I think I'm happy not because it's perfect, because I control everything to my satisfaction. Now at work I think "I've already proven that I can do something that I feel is perfect, so it doesn't matter that this is (very) imperfect, it's just outside my control."

Finally, another thing I've been thinking recently, is "find the fun in everything". Work is part of my life and I want to enjoy my life, so for any task I think about what parts of the task are enjoyable as I'm doing the task. Just thinking about and identifying what is fun about any task makes it better.