A lot of it is the system, as growlycat points out, and some of it is just rotten timing. Even if it's not outright rejection, I get how it can feel that way. It's hard to move past the sense of utter defeat.

I understand the fatigue and frustration. What I have to do when all the doors are shut is just step back from it all, stop trying for a while (could be a few days, weeks, or longer) and then when I'm ready, try again.