I see a severe lack of short hopping. I know it's hard to do with sheik but it's important, and the topic has already been made way too many times so just search for it. It seems like you generally lack experience, so this thread is a good idea for you. You missed several air attacks that should have landed due to poor spacing, and you went for the uair against roy way too much. He's heavy and has crap recovery so side kills are the way to go. You also wiffed a lot of your dash attacks and grabs, again a spacing issue. Also, just jumping on and off the ledge is not an effective way to stall as you experienced for yourself. Try to learn to shino stall and you'll be much better off. Of course you'll probably kill yourself a bunch as you're learning but no pain no gain. On a more positive note it looked like you were attempting to chaingrab and tech chase, and you have the basic idea for sheik of combo the crap out of them. Just keep on practicing and learning your character more. Good luck.