I don't have more experience than you, but I'll post any way, and you can take it FWIW. (I've been married all of five weeks, dated her for eleven months and knew her for three years before that, if you're interested in "credentials". Whatever.)
I don't know how you view marriage. For me, I promised to love my wife for better and for worse and she promised the same. I wouldn't have wanted to enter into a marriage with any other view or commitment. I think it would be too hard to make it if I (or she) was always evaluating whether we would stay together based on how rewarding the marriage had been for us. That means I plan to stay with my wife if she goes into a coma, gets cancer, becomes depressed, invalid, angry and bitter, messy and lazy, fat, whatever. I don't want her to become any of those things, and it would hurt to see and have to live with, but I intend to stand by her anyway. I don't see how any marriage can make it without that commitment. It takes that from both people for the marriage to really grow, but in all the real life marriages that I've seen work, there seem to periods, sometimes years long, where it was pretty one-sided.
IMHO, if you want to have a marriage that works, you need to be that kind of person with that kind of commitment. Leaving your current wife is not going to help you in that. But being able to do that takes being able to live life in order to give to someone else rather than living to take from them. For me that means being able to depend on God to satisfy if life (or wife) isn't.
I think there are some exceptions where the other person is actively trying to destroy you and the marriage by things like physical abuse, sexual infidelity, or just plain desertion. Maybe I'm misunderstanding or not fully understanding what you're saying, but your situation doesn't seem to be like that. It sounds to me like you're saying that your wife is keeping you from being happy or isn't helping you to be happy. You are responsible for making yourself happy. For me, happiness comes from knowing I'm a person of integrity, that I'm learning what it means to love, that my character and my abilities are being grown and stretched. I think if I were in your shoes, I would want to ask myself whether that would happen better by staying and toughing it out or by leaving. Even if you leave, it's not going to be like starting over right away or easily. Everyone I have known who has divorced has had to process through a lot of pain from that. Maybe more pain and more heartache than you have now. Some of them walked the long hard road and came out better people, but it wasn't easy at all for them. Other people let the bitterness get the better of them and ended up making the same mistakes again. I would encourage you to think real hard before you head down that road because it's not the clean break some people will tell you it is.