There are something thing at work that you cannot change or control.
You cannot always control who your bosses & co-workers are, the outcome of your work, or the number of hours you put in. (Although, you may have more control over those things than you think.)
What you can control, after you’ve done all that you can with regards to external forces, is your mindset. Internally, you can see all the good that you’ve done. You can recognize that no one can take that away from you.
You can surrender to (and be proud of) the fact that you’ve given it your best.
You can continue to be an unrelenting linchpin.