I thought my aim sucked with the Skewer and the Sniper Rifle. I missed most of my shots, unless the enemy was standing still.
Then I stumbled with an article from Windows Central called Best Halo Infinite controller settings (look it up, I can’t link it here) suggesting some tweaks for sensitivity and thumbstick configurations.
At first it took some getting used to, I suggest you to play with bots for a while until you get used to it. But in my first PvP match after that, in Fiesta, I got the skewer, and bam! While before I couldn’t hit a moving target for the life of me, now I got a double kill. Died, got skewer again, double kill!
I haven’t managed to get a triple kill yet, but boy, oh boy! That’s a game changer.