This is the exact situation where you need to use your truck driving strategy and show your boss that you can do more.
On the other hand, there are the dispatchers. They are really helping you, right?
Well, once you use your other truck driving strategy which is becoming friends with them, you can use their work in forcing them for more miles.
If you are feeling capable of completing more miles, you should not act like you are completely okay with it.
To continue with, you can let your friend dispatcher know about your situation and use their power to help you.
The right truck driving strategy in this situation is to not get angry about it. You need to act naturally and leave anger behind.
More importantly, what you do in this particular situation is lean into it. In other words, the right truck driving strategy will bring you back on track in no time.