Right now my biggest fear is that I'm not good enough to write because I have read a lot of amazing books and comparing mine to them is pretty pale in my eyes. Is it just me or does anyone ever feel this way?
Welcome, Yumpyyum.
I've been writing the same book on a part-time basis for six years, and just as I was nearing the end, I concluded there is no audience for it, so I'm going to shelve it for a future rewrite. My writing has improved tremendously over the years thanks to thoughtful reviews from others on this site and from critiquing their work in return. Nevertheless, even when I thought I was finished with the first chapter (after six drafts and dozens of reviews), someone came along and suggested numerous ways to improve it. I have several favorite published authors in my genre and I still think my story doesn't stack up compared to them. However, these days, when I reread their work, I do so from the perspective of someone who wants to learn from their writing, rather than just wanting to read a good book.
Key item: don't forget to reply to all reviews. Many site members put in a lot of time reviewing the work of others, and the reply is an important way to thank them for their time. Obviously, if you like their work, critique them, and you might develop a reciprocal relationship between them and you. Naturally, not everyone likes to read every genre, so it may take a little time to find interested reviewers for the long haul as your write and post your work. As already noted, a very small number of people give blunt reviews. Don't let them dissuade you. One of the best reviews I ever receive was from someone who told me to start over (and why). He was right, so I did.