Try not to be depressed about it. That is just the way things are and there's no point in letting it depress you. You have to focus on making your life as good as it can be now without holding out for some wonder drug or cure. The FDA only approves on average 20 novel molecular compounds (drugs) drugs onto the market every year, some years it's in the teens. Depending on the figures you look at, as many as six out of seven of those are only variants of existing drugs so that's what you are looking at as a reality.

My purely personal view is that theres no point in worrying about the things over which you have no control. There's even less point in letting things that you can't control depress you because that is reducing your quality of life. If something fantastic comes along in the future then that's awesome, but live for now and make the best of what you can.