Stop measuring yourself with other photographers. Just go out and do your thing. I’m pretty sure your work is quite good. Believe in yourself, your current camera is just fine. As citizens of humanity we are constantly bombarded with what’s suppose to be the latest and greatest. With the plethora of choices our brains go into this weird mode and sometimes it takes the best of us and of course ― our wallets. In the end, its just a tool, a means to an end, use what you have and be happy.