Bangbang - You have to be very light and gentle when making biscuits - you can't beat them to death!
A tip for adding the butter into the flour mix - try shredding the very cold butter on a coarse grater right into the bowl, then just mixing it lightly with a fork; then add your liquid and just mix lightly til it comes together. Biscuit dough should be soft.
Then on a floured board, roll or pat the dough into the thickness you want, and cut out. Another tip that saves a lot of 'rerolling' to use x-tra dough from circles - pat the dough into a rectangle, use a floured sharp knife or board scraper to cut squares or rectangles, instead of circles. No wasted dough!
And a last bit from my oh, so dear gramma-in-law from NC - after your biscuits are on the pan, dip your first two knuckles into some buttermilk or plain milk, and just 'top' the biscuits with your knuckles; she always said she was adding a little bit of love to the biscuits!