I think I know where you are coming from here, even on the donnington Nissan Event day the GTR boys were very quick off the mark but as soon as you got to a tight corner they were all over the place. For me the corners are the fun part as TBH any car can do 3 figures these days.
It's not shame not to like it, not everyone can! You know the Z now too, I bet you felt a bit detached in the first week of ownership though.