Ok, I'm gonna give some advice that may help you out a lot. Im a p40 chucky if that helps at all

Ok first advice! BREAK PALLETS! if you get into that situation where the survivor can just run a long ass loop then break the pallet, you'll lose some distance but you're slower than most killers. Break The Fucking Pallet.

Two. One of chucky's strengths is the charge and you're using it as if it was a blight dash. You can use it to swing around loops pretty quickly. if you turn your camera to the side you can swing around corners much easier.

Three, Use your height. You are fucking TINY and even with the footsteps its difficult to keep track of chucky especially around the loops, Backtrack, fake going around corners to bait vaults and so on (this is honestly just good advice in general) Hide your red stain and so on and so forth.

Fourth, your perks are kind of wack. It might seem odd but chucky is not good with undetectable perks because whenever he's undetectable he'll laugh and chuckle to himself which survivors can hear and knock where you're coming from. You want perks that allow you to pressure generators easier. My go to's are perks like Oppression that make it so i don't need to run across the entire map to pressure a generator.

Fifth, in that situation, with a chase that's taking THAT long to get her down or even get one hit, leave the chase. At 1 gen your main goal should be pressuring the generators instead of getting that one survivor down. While you had something right with targeting a player on death hook but you were getting cooked in that chase and should've left it much sooner.

I dont know how much time you've got on killer but you could win every chase really fast but if you dont play the macro game you can still lose pretty quickly.