The world is a saturated place, but people still create amazing things. For instance I have seen people create the stupidest things where its flooded already but still get noticed due too the fact it was different. "you can make toilet paper to be " In this stage of time in the world anything is doable now, but everything takes hard work and long hours too.
With you doubting the world you are just doubting yourself. Before you look at how many games are out there you should of already started making your own game. Are you doing it for the money or because you like it? I find that most people who do not have a passion in what they do tend to fail.
All these big company’s started small, and grew big from just building and putting long hours and hardwork into something they love doing.