Writing is fucking hard

When writing up reports or essays words are my friend. The language flows freely, is given freely, no pressure. I know that it's all space-filling bullshit.

But when I try to write something, really write something, it's forced, one half-sentence at a time, stinted, broken, because I don't want to write bullshit, I want to make something that will rival the works of my idols, something fantastic and great. And the words just don't come out.

For one thing accept that the first draft is always shit, you're always going to need to go back and revise. If you expect yourself to write something publishable you will only be disappointed. Especially if you're comparing yourself to your idols.

Stop trying so hard to be amazing, if you're writing and ideas are good enough it'll get there if not you're wasting your energy. Don't try to force your writing. Let the words come to you.
If you've never felt the words come to you instead of you having to chase them you're likely not a writer