Hey Minh, I just think its a little impatience that we all have in us. At some point we are bound to get frustrated on how long u have to "rest". I don't think it's about being grateful or not. You have to rest before surgery rest after surgery rest during rads and after meanwhile you want to live your life. I hear your frustrations even though I am not the one diagnosed. I see that same frustration everyday in my sister.
Just letting you know your not alone. She just finished rads on Monday I think it will be better soon.