Take a moment and repeat after me.
My game is fun.
My players have a good time playing my game, otherwise they would not still be in it.
No one knows, or cares, that I didn't execute that scene as well as I imagined when making it.
No one knows, or cares, that the villain didn't get to say verbatim that witty turn of phrase I thought of when planning the encounter.
It is not my fault the dice turned against my players.
It is ok for the dice to turn against my NPCs.
As long as people are having fun, everything is going just fine.
Yes, that includes my fun too.
And if you're a player...
I don't need to have all the answers to all the questions
It's ok to fail.
It's equally ok to be proud of a clever idea, build, or whatever.
It's ok to geek out about a character and invest a lot into them
It's ok to take a game very seriously - provided it's not to detriment of the group.
It's ok to not take a game very seriously - provided it's not to detriment of the group.
It's ok to talk to the GM about what I want to see in the game
It's ok for my character to be a trope
It's ok for my character to be a clone of a popular character in fiction
It's going to be ok.