Okay, so you need work, i'm a new fox main just started yesterday, after leaving sonic because i can't have that messing with PM Sonic. Your opponent is really bad, but you definitely need work as well, you need to learn DI when you were grabbed you didn't even try to. Ariels are your friend more specifically neutral air, its a good move, when you grab, down throw is really good. You fished for the up smash way too much, it was obvious and a shield grab from a good ZSS would have closed your stock real early. Need to work on your reads both sides were working on weak reactions mostly. Stage movement is important SHFF (Short Hop, Fast Fall) around the stage keeps you mobile and unaffected by sliding and keeps prepared for aerials, Never forget that grabbing is an amazing option. Dash attack with a purpose, don't just throw it out, use it to extend a combo or cross up on a shield into something like uptilits.