The main character is too exhausting. I hope and pray she has some character development so she stops treating everyone so badly. Even if you can't trust people, you would at least want to be decently polite to not draw negative attention to yourself? It's very much a tell don't show sort of writing where the main character had some kind of nebulous training that makes her able to perform all kinds of feats off-page like weaseling her way into a school and climbing down a building unnoticed. If this was a dual perspective romance then maybe I could have made my way through it with breaks from her POV, but I do not care at all about this world or these people. 

If you are absolutely desperate for a generic enemies-to-lovers marriage-of-convenience he-falls-first (is that a spoiler if it's obvious from the moment he's on the page?) and have read all of the other ones, then maybe read this one?