I'm very familiar with it, but I don't struggle with it so much as a writer. Don't get me wrong. I would do anything to be able to afford hire an editor. I get sloppy sometimes. And truthfully, I don't consider myself a great technician. I can slip a dangling modifier into a story faster than you can find a toxic Facebook stalker. Etc.
But I don't let that stuff get in the way, which I think helps the stories flow for me.
I always felt like an imposter in the world of software, so I do know the feeling well. I'd often look at code and wonder what the hell this writer was doing implementing business transaction code for enterprise level websites that handled peoples' important information.
You're no imposter, btw.