Is life better in US than eastern europe?

I am from Poland, I am battling depression since a year, and I described my situation in a few posts here already. I have been thinking strongly about what I actually want, and somehow I always think moving abroad is the answer - especially somehow US comes to my mind. I have been once to NYC and I loved it (I hear so many people hate it...). However I have a wife who is reluctant for such an idea... I have a job here which I do not like though....

So is the life in US better? Please tell me, convince me it is not and that I should be perfectly happy where I am :/