Poke Channel, my rating won't go up

In Poke Channel, my rating just won't climb because I keep alternating between winning streaks and losing streaks. This happens in other gacha games too. During winning streaks, I can sometimes win 7 times in a row, but then a losing streak hits, and I lose about as many as I won. When I'm on a winning streak, I might win even with blunders because luck is on my side, or I only face teams with favorable matchups. It's the opposite during losing streaks; I tend to face teams with unfavorable matchups and lose due to bad luck. I just can't seem to win more than I lose... 😭