I will not kill spiders or a wide variety of other bugs/insects, but I draw the line at ants, ticks, flies, fruit flies, wasps, hornets, and yellow jackets when I find them in my home (bees are cool). I will mercilessly slaughter every one of them and leave their corpses as trophies and as a warning to their kin.
I freaking hate most bugs, mostly the ones with hard chitinous bodies.
I feel you, friend. I know the importance of bugs in the ecosystem, both extended and local. I will leave any small spiders and bugs I find in my house alone (other than ants, because stay out of my fucking kitchen, that's why).
But anything large or chitinous enough to "pop" or "crack" when I squish it just makes my skin crawl. In fact, I literally just had a shiver run down my back from typing this.