I agree that some marry down. it's just a simple fact that not everyone brings an equal amount to the table.
if you find your spouse limiting your personal growth due to their insecurities, using manipulation to control you, and cheating on you. chances are, you married down.
it's not a bad thing to realize that there are bad people out there. sometimes you don't find out they're bad till you marry them, lol. I think labeling behavior such as cheating, abuse, lying and worse as mental illness or mlc is the ultimate in using justification to rationalize one's situation.
yes virginia, there are some bad people out there..