Chucky,
Who says the food is better? You cannot interpolate your poor experiences to rest of the population.
And why not date a sefardi? It depends how much mesorah means to you? Would it bother someone to make such drastic changes. That is besides any other differences that may exisit that would preclude a shidduch.
Perhaps someone who has no mesorah, or makes it up as they go along would ask why not, but for most people there can be very well established reasons not to go out with a sefardi and vice versa as well.
Would you go out with a chasiddish person? Someone from Meah Shearim?