You have a notion in your head about what this place should be. You made it up and are now upset that your imagination isn't reality. So, to this I say "Hello. Welcome to the internet."
EDIT: You are free to post as you choose. If you want to be puppies and rainbows with everyone, then that is totally fine. Others do not feel similarly. I often choose not to be snarky when others do because that's how I feel that day.
Go with the flow. Get to know this place the way that it is. Be yourself. But, don't get upset when everyone on the internet doesn't behave the way you think they should.