it sux.
until the very end, the cheating wife keep getting plot armor.
even after divorce, she lied and destroyed any possible romance between MC and FMC.
and she jumps to new guy too.
the old swordman is the worst.
the reason he didn't solve the misunderstanding is flimsy and so selfish.
"oh, if he didn't like what he see, he should punch me instead of running away"
you are not normal.
normal person will move on if they find something they don't like online.
but calling the Author sidestory as fanfic is an oxymoron.
fanfic is fiction made by fans.