Personally I don't believe that Applejacks should be hated as much as these memes show. I do see her as my least favorite however this doesn't mean that I hate her. On the contrary I find her as a hardworking pony maybe even more so than the other 5 which is one of her best traits. I would say that the reason many people probably don't like her isn't because her personality is bad, its probably due to the fact that she has the least screen time as the other 5 which can be clearly seen in season 1 and she hasn't had very that many good episodes to really develop her character (this is completely my opinion sorry to people who believe she has had plenty of good episodes).