The only person with your interests at heart at the table, is an attorney you hired.
Lets be realistic.
1) The LA Lied ( you can prove it for a couple of grand)
2) The damages were mitigated. (French Drains, new carpet)
3) What’s your harm? Your feelings are hurt? You would have bid lower?
So you think you might have bid 10K lower? You have the house now, You retain an attorney and that will cost you 5K minimum, maybe more if they go to court.
Fuck it, suck it up.
Every used house has issues, every new house has issues.