Can I dispute equity split from house sale

FBaby

I understand that you are aggrived, but buying a house is a business, and from that perspective, you manage your business poorly and lost money as a result.

Firstly you didn't protect yourself when you drew the deed of trust. Then you made the mistake not to get the house valued at the time she left. Then you made the mistake of spending money on the house to improve its value.

All these have cost you. So yes, she is the one gaining, but she wouldn't have if you had conducted your business properly. From that perspective, she was just smart and did the right thing from her business acumen perspective.