I don't know if this book was over-hyped for me, but I seem to be one of the few people who didn't love this book. I thought it was OK. 
 Dislikes: 
 - The first 200 pages. I tried to read this book multiple times. The first 200 pages just bore me out of my mind. Only because I got past them this time was I able to finish this book. 
 - The focus on the traumas that everyone endured. This might sound very cold-hearted. Maybe I just read too much fantasy. Usually, the type of world that this type of story takes place in is very brutal, with war and oppression. So when I finished ACOTAR I honestly did not expected ACOMAF to go down the road that it did. I had to go back and re-read the ending of ACOTAR to understand why Feyre and Tamlin were acting so messed up, and I still didn't get it. Like I said, maybe I'm just cold hearted. I appreciate what the author was trying to do, but for me it just felt like there was no end to the traumas. At some point I started saying to myself, 'yes I get it, Feyre went through stuff, OK, now let's move on with the story'. The backstories of the other characters, especially those of The Night Court/Dream Court, didn't help either. As each of the main characters kept emphasizing that they went trough hell at one point in their lives. For me it was just too much and made the book unnecessarily long. At some point it just annoyed me so much that I wanted to DNF the book. 
 - The very repetitive discussions and dialogue. E.g. Feyre: "I want to leave the house". Tamlin: "Nope". And then this happens chapter after chapter. Or, Rhysand: "*insert flirtation*". Feyre: "Prick". Again, chapter after chapter. I also had problems with liking the Inner Circle of Rhys at first, as the characters were just throwing insults at each other and then pretended to be pissed, while they are clearly friends and not going to attack each other. Overall, a lot of discussions and banter just seemed very unreal to me. 
 The good stuff: 
 - World building. I liked how the reader is introduced to new cities and courts. 
 - The quests that the main characters went on to find/retrieve fay treasure. 
 - The ending.