Grammar all wrong

"This book was good but really hard to understand. All the grammar was wrong and if you read each sentence the way it was written then it made no sense. You find yourself putting the correct words in the sentence. Drove me crazy! Gave me a headache. Made the enjoyment a lot less. Someone should of proof read this story before posting it. The idea of this book was cute though. The female lead should of been more mature in my opinion. Anyway it’s a quick read unless you take the time to re-read the words how they’re suppose to read… then it takes a bit longer. "