So I have recently started working on a fantasy novel, and I've come to realize that my prose is absolute trash compared to what I like to read. It's bland, bare-bones, one-note, and clunky. I'm constantly at a loss for words, and everything I write is lackluster in some way. It's very frustrating. I feel like my writing is at a 6th-grade level.

I read almost exclusively in English—a wide variety of genres, and have done so for the past 10 years or so—but it's not my native language. I'm really frustrated because I used to be decent at writing in Farsi—at least I didn't have to think about grammar and vocabulary—but now it's as if I'm recovering from a stroke. I can't write at all in either language it seems.

Do you have any tips for me on how I can improve my writing? Or how not to get pissed off at myself after struggling for an entire afternoon to write a simple hike-through-the-forest scene?