Hills suck. There is just no denying that fact.
When folks come to me to get help with archery we'll sit down for a while and talk. To the person ALL(!) of them practice what they are good at. I'd say that 99% of them would just stand there at 20 yds and pound arrow after arrow into the target... because they are good at it. To get them to move to 50 yds or further is like pulling teeth out of a chicken.
The moral of the story is; Don't practice what you are good at. Not a lot of point to that.
If you suck at hills go ride hills.