I was reading an article in NYTimes and stumbled upon this line
It is proving to be anything but.
What does this actually mean?
Please feel free to read the article to get the context
So if I say "It is proving to be anything but easy.", I mean "I've spent a significant amount of time trying to do this, and it's not easy.". It doesn't necessarily mean that the person hasn't been able to do it, but there's a strong implication of that.