I have come accross a few people who hated flying for the first six months, then developed a love for it .... but very few. Most either love the job or hate it.
I loved it from the first day, and have done for 10 years !
My advice, flying is not for everyone, particularly those who need their sleep. If you hate flying, then quit. It is only gonna get tougher, as work rules are slowly eroded over the next few years.
Dont get stuck there hating it, and find when you have really had enough, that you have been doing it for too long - and then youre only qualified to be a waiter !