A priest said “as soon as you bring your parents into an argument you’re having with your spouse, THEY are now part of the argument. Don’t do it.”
Do not bring other people into your fights and do not bring other people's problems into your marriage.
One thing I observed as a single is that when men or women get together and start bad mouthing their spouses it quickly turns into a game of "Topper". And that is not a game you want to play or even be around. You can have the most wonderful husband or wife in the world but that amount of negativity will sour the way you see them.