Not being satisfied is the foundation required to be great photographer ... Not being satisfied can fuel your passion for a lifetime of photography. (Not being satisfied can also extinguish a passion also, lol.)
I've been shooting for more than half a century and I am still not satisfied. There are times I want to throw my cameras against the wall also. I always see photos that are better than mine that I wish I had captured (and I worked professionally for a couple of decades). Not only are the photos of others better than mine ... but everytime I process my images I think of ways to improve and kick myself in the butt for not seeing those improvements until after the fact.
Technically, photography consists of a series of steps. One's attention to detail at each and every step is required for technically great images. What separates the professional photographer from the hobbyist is consistency. (I am using 'professional' as a measurement of ability not as an accounting term.) The ability to day-in and day-out capture the exceptional image. That consistency requires time behind the viewfinder to develop the skill and experience needed for professional level consistency.
Improvement isn't a matter of time since you first picked up a camera ... improvement is based upon time behind the viewfinder. In the beginning the best/quickest way to get higher on the learning curve is with a formal/structured environment. Take a class online or at community college, join a photo club, find a mentor and most importantly shoot. Take your camera out with you and shoot everyday. To reinforce what you already seem to be doing is to be your own worst critic. Self critique every shot, ask for help, delete, delete, delete. Three basic rules for improvement:
1) Shoot;
2) Shoot again; and
3) at the end of the day when you're done shooting ... shoot some more.
I am very competitive. I love photography because it pushes me to do better, it feeds that competitive element. Challenge yourself, channel that 'not being satisfied' into fuel for improvement. Doing so will give you a passion that will last a lifetime.
Gary
PS- To answer your question, Yes.
G