Breaking contracts on day 1 without any idea whether they were worthwhile. Must have been inspired by Elon
I'm expecting that she'll avoid
all most deleterious consequences of her actions because plot armor, but still...makes her harder to root for, even if she is supposed to be a villainess.
She canceled appointments and deals, not contracts, there's a difference: Appointments are simple meetups, so they (normally) have no repercusions, not to mention she canceled all those aimed towards
her father, not towards her or her house (as in, aimed at the family and not the guy). Deals are unwritten and not-legally binding, so if they were important then the people involved will try and talk
to her in order to get them again. Contracts, however, ARE the ones she didn't, or more like couldn't, break on command... though she likely won't have to, since usually those are appointed towards the person or the company, not towards the family name.
Long-story short, it was a combination of a power move, a way to make the change in administration known and a way to prevent shit like what just happened to happen again.
Though I do agree with you that such simple solution to a potentially complex issue SHOULD have consequences, but seeing those in a mid-low villainess manga is asking for too much.