Mixing long top tubes and short stems makes the bike look very strange, and can affect the steering, making it too reactive.
It may be that the frame is just too big for you.
I ride a pretty standard old fashioned road bike with a 54cm top tube and 8cm stem. I prefer to ride a short bike, and my fingertips reach to the centre of the bars.

You riding position is for you to decide, whether you prefer long and low, or shorter and more upright.