> It doesn't matter if the developer uses polite wording, I'm still insulted.
The drama you generate inside your own head is not the developer's responsibility.
Closing a bug as "NOTABUG" is not an insult. Closing a bug as "NOTABUG" means the developer does not think there is a bug. If you take it as an insult, then take responsibility for your own feelings. Don't blame the developer.