I have that same issue simply because writing is not my happy place and since I am a vivid reader and love reading great content and books, reading my own shows inadequacy in that area.
What helped me, I stopped going through the lessons now,until I finish my core content, no links . Since I want to know what's next it keeps me motivated.
I hope that helps and just understand you are not alone in that. I am pretty sure some people go through that issue.
Also, having a break for a day or day may clear your head.
Cheers,
Milla

Regcain, don't get down on yourself. You've got this! The creation of content is a learning process for all of us. I constantly have to fight my perfectionist mentality, I have to always remind myself that my site and its content will not be the greatest the work has ever seen on day one. You can also use content from other sites to help you create your content. If your like me you avoid things that your stressing about...I face it by confronting it directly. Once you do it you will feel so much better. I'll be here for ya...Go for it, don't be scared to learn. All the best...Let me know if you have any more questions...