I'm with you through and through, like ppl blaming the FL here. She was just naive to believe that fking MIL and dad. Well, of course, if you had to choose whom to believe between a dad who cares a little at least or a husband who hates and neglects you it's obvious what choice she'll make.
And it's not like she suddenly became mature, she just repeated her life countless times.
And I hate the ML's monologue of how long he'd known her and her dad but doesn't know or care to know why she changed after marriage. Fking a**hole.

It seems like her biggest/most desperate actions i.e. damaging the ML's business were on the advice of her father??!!!
(╬ ̄皿 ̄)
So:
* She was ignored, openly resented and eventually despised by her 'prince'. But likely continued to not know the core reasons why...