>>Every single married guy I know is MISERABLE. The sex pretty much stops within the first couple of years. And the woman gains mega weight, because now that they "got" you, they don't need to keep in shape. And then the whole bitchy wife comes out treating the guy as a second class citizen.
You do seem to know an awful lot of extremely unhappy couples. That's not my experience at all. For example, my parents are in their fifties and still have sex 3+ times a week, a fact I wish I didn't know. I know many other very happily married couples.
Obviously, my anecdotal evidence is just as useless as yours...I don't see how we can generalize that there is nothing to gain by being married.
The divorce rate is 50%...but the failure rate of startups is even higher. Starting a startup and failing can also ruin you financially and burn you out -- should we then assume that it is a stupid idea to start one?
>>Marrying an American woman is pretty much the worst decision you can make.
I am not an American girl, though I recently moved to the states. I am European myself -- and I have met just as many cultured, intelligent, kind American women as European ones. Why do you hate American women so much? Perhaps by "nice European girl" you are imagining an especially submissive woman? Perhaps your experience with American women only extends to suburban princesses and soccer moms?
Either way, I can assure you that your explicit hatred of American women ensures that you will never meet one that you will like.