Jungle Tracking
You repeatedly played around Bel'Veth and Amumu’s positions in this game, and the biggest mistakes happened when you ignored that information and took fights or used E as if the lane was still a clean 1v1. The habit to build is to treat missing jungle as a hard constraint on every trade: if you don’t know where the enemy jungler is, your job is usually to keep the wave in a state that lets you back off or turn, not to spend cooldowns just because Sion is in range. When you do have a read, use it to widen your punish window — if Bel'Veth is shown bot, you can be much more aggressive on Sion; if she’s missing, keep your escape tools and avoid giving up the exact kind of 2v1 that flipped this lane later.