Discouraging things to hear when you are working hard

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"Just wing it~"
Doesn't it get annoying when you hear that?
The other person might think they are being helpful,
but it is not helpful at all.
It's not like I'm being overly serious and obsessed with something useless;
I am just working hard on something that someone has to do,
and then they come up to me and say,
"Just wing it~"