At the end of each year of PhD we had to do a mini write up and one of the things I did in my first year was quite a comprehensive lit review. By the time I came to my third year I, like you, looked at it and thought - who on earth wrote this rubbish? Oh, I did?!?!?
The only good thing was it meant all my references used then were at least already in my database!
And it's a good thing definitely realising how you are improving!