The Beau & the Belle

I'm more than halfway into this book and it is still so terrible. I've read a bunch of R.S. Grey's books and really liked them but this is such a major disappointment. This might end up being the book I give up on after already being mostly done with it. But I don't know if I can take hearing another word from the jerk who's supposed to be the heartthrob we all want the main character to end up with.
Putting aside how messed up the age difference and their living situation is,

First off, the main guy somehow goes from being a a super nice guy to a complete controling possessive rude asshole within a span of ten years and we're supposed to still like him?

The main girl stays exactly the same in her behavior and approach to men from the age of 17 to 27 and that's just... no. So wrong.

The best friend is more like a frenemy always being selfish or leading her down the completely wrong path.

The only redeeming characters are the parents and the guy the main girl passes to be with the weird asshole.

I definitely don't buy their chemistry (after the ten years) and I keep trying to give it a chance to see if it'll get better but instead it keeps getting worse and worse and WORSE.