Sadly the only attitude you can have with some people. I have seen and experienced a little of this too here, unfortunately some people put on a show of liking someone's work to raise their own profile I think. Or don't have it in them to show real give and take/respect when it matters. It's like real life, you can probably only trust a few people here when it comes down to it, and even then, it's still just the internet. I'm sorry you experienced this though, only kind and sensitive people tend to get taken advantage of by self interested jerks.