Don't busy brag. The message you think it conveys is that you are hard-working and important, but it really conveys the message that you don't manage your time well and that you commit to things you can't finish.
Don't failure brag. This consists of thinking your setbacks are worth of respect. We've all had grant proposals rejected, so there's nothing particularly meritorious about it.
Don't complain about the low level of your students. What you think it means is that you are a great intellect giving pearls to the swine. But anyone can teach good students: it is almost effortless. Teaching actually means meeting students where they are. The easiest thing in the world to do is pitch a class above the heads of students and then complain about them.
Don't humble brag. The humble brag consists of complaining about something bad in order to brag about yourself. "I'm so mad at myself because I've only published three articles this year."
Suffering doesn't ennoble you, it is just suffering.