you're really fast and have good precision as far as micro/macro (a lot better than me on those fronts).. the only reason you're losing is because you're making bad decisions and failing to anticipate brav's next move, even when they're obvious.
game 1 even after he ripped through your late dual @ 2 (which wasnt a bad idea imo) and you had adequate defense @ 12 (tower and grunts) you continued to make mass grunts/farms. that woulda been a good time to cut your losses @ 2, choke with 4 grunts @ 12 with the guard, and just slam your way to lust imo.
game 2 4v9 you raxed him right from the start & killed one of his scouting peons. he was immediately behind at that point. he wasn't going to be rushing you any time soon. you had maybe 2 grunts but continued to make more grunts which took resources away from other areas. i think you woulda won the game if you just focused on continued scouting, peons, and resource management early game. you woulda dominated his mid-late game nfp