I have the same problem and I see post where people say you can get used to the amount of handlebar drop. I don't think i can get used to all 5 inches at one time though being i don't have a good level fitness on the bike right now. My previous bike was too small for me but i kind of liked it.
Personally gona try to get a bigger frame to stick all the parts on but if you can take it back that would be much easier.