We won't because the writing is shit already. Look at any divorced couple (like your parents) and ask yourself if they would marry one another again if they were young again.
Something I've noticed is that they tend to be very new, with few chapters released, POV one-page-a-chapter etc. they also tend to have more romcoms and isekais.
I also dislike it when the FMC is new to the school and meets the MC before she gets to the school, or if they are close right away (because they sit right next to another, which is another trope that is overused.)
When a character gets introduced just to stir up some drama which will get resolved next chapter anyway. It's a really lame way to introduce drama between a couple, and just shows bad writing. The drama should come from the differences between the couple.