I figured out what the fuck is going on with Impulsive.
https://files.catbox.moe/el1ggb.mp4

First of all, note that this is considered one of the worst personalities, something that is 80% it's fault but 20% the fault of the community not learning how it works despite the pet update having come out in like 2018 or some shit.

The way this Nature works is:
1. Pet movement speed is way up in certain circumstances. We're going to call this dashing. Japanese sites say it's +100%.
2. This pet will dash inbetween attacks to try and angle itself outside of your target's frontal arc. If you aggro an enemy and then face it's back to an Impulsive pet, they'll turret up and wail on it like anyone else.

Impulsive still sucks ass, but this should help you limp along with it until you fuse a better Nature onto the fucker.