There is a little thing you can do actually. You can pin a marker on the address, call it its name eg 24 smith street, and leave a 1 star review for the house.
I own the marker for the rental I am about to leave on google and it’s going to get a shocking review when I leave - all of which are not disputable because I have an extensive paper trail and dozens of videos.
If you are too afraid to leave a review, get a bunch of mates to also mark it as one star. It will sow the seeds of doubt in a lot of buyers minds.
Zoopla also don’t care if you say you own a house and you go in and adjust the house size, number of rooms, sq m floor space. Within two months when it catches up with itself and tank the alleged zoopla value. It’s perhaps on the vicious side but if you really need revenge to get over it, it’s very easy to do.
You could also post copies of the EA letter saying she is pulling out with 30 mins to go to every EA in the area “just thought I would warn you this is not a serious seller.” Someone will still try to sell their house, but I have been told there are actual EA black lists, and most people won’t want to waste their time.
Mark Kermode has a saying that I remind myself of when I am tearing my hair out “it will be alright in the end. And it’s not alright, it’s not the end.”
So often when we are shat upon it’s a learning experience. About ourselves. About gut feeling. At spotting red flags. Or even just realising you were clutching at straws and the floor layout is awful and you won’t consider it again. Or that an EA is not doing a good job, etc etc.
Be patient, remember to breathe. Do something lovely this weekend. Spoil yourself.
That better house with an amazing seller is waiting for you, you just need a little bit more time.
Give yourself time off til Feb when the serious sellers start flooding the market.
Sending hugs x