If it's not worth breaking up over, then it's not worth arguing over. If you’re arguing every other day, you’re not in a relationship, you’re on a debate team. Not every concern needs to be an issue. Let the insignificant things stay that way.
Three things you cannot recover in life, the word, moment, time so choose, embrace and never waste time arguing over things that will not matter in the last 5 minutes of your life. Always remember this. It's not worth it to waste your life angry.
No/low contact is the only way to go. Don't take their bait. Never argue with someone who believes their own lies. And remember: every abuser believes EVERYTHING that comes from their mouths is pure truth.
Don't be afraid of conflict. Conflict, managed well, is a part of any healthy relationship. It's not about striving to suppress the differences, but communicating in such a way that the differences can be accepted, and maybe even embraced.