I have problem in understanding the meaning of word "stuff", the first one and the second one:
Jean says that she’s “getting tougher” and learning to detach herself from each teacher’s individual struggle to change and improve. “I’m getting tougher to where I can say, hey, let them go, this is the change stuff that you’re seeing; you’re seeing them blow up, it’s a loss right now and they’re grieving over a lot of stuff. Just get out of the way.
Please tell me the meaning of "stuff" in this context (both the first one and the second one).