No. Entitlement would be to expect a community not to rebuke you despite the fact that you're breaking their guidelines and posting low quality content.
That's not the flip side, that's literally what I'm saying. To stick with the internet programming community after i.e. getting your StackOverflow question curtly dismissed requires a level of confidence that not everyone has.
I'd call it humility rather than confidence.
Absolutely not. The humble thing to do is to correctly interpret the signal that you are not welcome, and leave.
On StackExchange, it's not "you" that isn't welcome, it's low quality content that is unwelcome. The humble thing to do when having been rebuked for posting low quality content is to accept the criticism and improve yourself. Expecting to be treated like a valued member of the community even though you posted some garbage is entitlement.