MAN you guys hate your wives. As someone who's never convinced a woman to spend enough time with me to get married, I am obviously the most qualified to give relationship advice, so here goes.
If she's bitchy, she's probably unhappy. Very few people are unpleasant just because they like stirring up shit. Figure out why she's unhappy, then ask yourself what's worse, fixing her problem or living with her unbridled bitchitude?
Sometimes it may be unfixable. Maybe she's bitchy because she woke up one day married to a fat old dude. In which case she needs to grow a pair and leave instead of trying to make you as unhappy as she is. Or maybe it's totally fixable, and if you'd stop leaving your socks in the living room floor or rubbing your balls on the furniture or putting bullion cubes in the shower head, she'd be happier. My point is, identify the problem. If you're not ready to give up soup showers, that's cool. But you'll at least know why she's bitchy.
Again, this is zero years of marriage speaking here. My opinion is untainted by the imbruement of experience. Accept it as gospel and follow it without question.