There are no Linux gatekeepers. There are assholes everywhere, that's the human condition. I came across these assholes and I learnt that I should take advice and consider it myself.
If you close your brain and listen to random online people without thought, you'll have a bad time, Linux or no Linux.
This stereotype of people in Linux or open source as assholes is FUD spread by people who have a vested interest in spreading it.
I've found people mostly very helpful and courteous.