I Can't reach Master 5

My second season trying to climb the ladder, and first with Voiceless Voice, its been two weeks now, and i reached Diamond 1, but i couldn't reach M5, i had THREE " Win and you'll rank" but always that last game, its either bad hand or going second, to the point i thought of stop trying because i play to learn and have fun, not to get depressed. having three times the "Rank" message but failing is tough. maybe my gameplay isn't good. im thinking of playing Yubel or something better going second.

Is this D1 this Hard ?