I cant say I feel this with my channel but I have experienced this with my work when I started my business I felt that everyone else was established and I was very cautious about everything. Now I know that my work is consistently good and I have more self belief and I dont think that way. With my channel I have just began but I dont feel confident in my skills just confident in knowing my niche
I think that is a pretty common feeling, especially when you are starting out. Most people are their own worst critic. Experience has a way of quietening those doubts though and the more you do it and the more positive feedback you get the easier it becomes to just trust yourself.