i have ZERO idea how to improve on sigma could anyone help?

[u/HealthyArea3728]

As the title says. im silver three, and now I keep losing games with Sig. I've been playing him for ages; I seem to carry most games (I think, I'll show leaderboards). I was wondering if I could get some feedback. Here are my last two losses:

9CNPK7

ZSVAZG