I feel for you! I have sheared off the presta valve end too. BUT, don't give up on them just yet! With a tiny bit of practice, and a good quality pump, you will quickly learn to love the presta valves! I, also, hated the valves at first, but then my DH patiently showed me how our particular pump worked for those valves. If you aren't sure, then put on your best smile & ask your local bike shop to show you. I bet they would love to help! Each pump is a little different & I personally prefer the kind that twists to lock on to the valve stem (like the old school blackburn models).