My batting average is gradually improving

Even with this trash lineup of one maxed-out free-to-play S-rank player, under 5000 speed, and almost no limit breaks, I've made it to Platinum 2. My batting average was around 0.180 last month, but it looks like I'll hit 0.300 soon. I'll keep working hard to break out of the ordinary. Also, the speed difference is insane; sometimes my stats get halved.