I suspect fights get more frequent with Cheaters because we are no longer their primary relationship and support.
They have someone else. So, it costs less for them to harm the marriage relationship. They have less incentive to fix what they are harming as well.
One of the gifts of divorce is freeing us from those intense and crazy argument cycles with our cheater.
Divorce is truly a mercy from God (Mt 19:9) for faithful spouses. We do not have to stay in relationships where we are abused by a cheater verbally, emotionally, and spiritually. God gives us permission to leave. That is life (and peace) preserving, in my opinion.
The weirdest fight I can remember during the year of discard, was about salt.
I had made his pan of almost daily mac and butter, so he could eat it while sitting on his lazyboy while talking on his phone. (before cell phones it was ma bell).
Anyway as it turned out, I had run out of salt. I tore that kitchen apart looking for salt. All the while he was screaming at me about how stupid I was for running out of salt. Apparently, in the context of a 21 year marriage with a wife who did all the domestic work, running out of salt was a horrendous crime. Once he had exhausted himself screaming, he ran out the door to ride around with one of the guys. (he was a police officer).
There were a lot of tirades that year, none were based on anything significant. You would think if I were so awful, he could have found something worse to rant about.