Without mentioning the specs of the car, this is my first ever attempt at designing a bumper sticker. Those hornets are from the Kia Stinger GT Tribute Edition. At least one positive and one criticism each, please and thank you! :D

The mirrored red hornets are the best thing here. They frame the text like bookends, the red pops hard against the black, and the symmetry gives the whole thing a proper emblem feel for a first attempt. Using the real Kia logo and Stinger script was also smart, because it ties the joke to the car without any explaining. The criticism is the brush script, and it's a big one. The "HELLCAT KILLER" lettering is so scratchy and slanted that "HELLCAT" reads closer to "HELLLCAT," and a bumper sticker gets about two seconds of attention from a car doing 70. The slogan is the whole point, so it has to be readable at a glance.

Love that the hornets are doing the heavy lifting, because the KIA oval is the one thing dragging this down. Here's the thing: the Stinger GT already killed the Hellcat's whole ego by being half the price and still hanging with it, so the claim earns its spot, and those red Tribute hornets flanking the corners look genuinely sharp and custom. My criticism is the fonts are fighting a war nobody wins. You've got jagged graffiti "HELLCAT KILLER," a clean corporate KIA oval, then cursive script for "stinger" all stacked together, and it reads like three different stickers got into a car crash.

The red hornets are the strongest part: bold, balanced, and instantly recognizable against the white background, which is exactly what a bumper sticker needs. The criticism is readability: “HELLCAT KILLER” has attitude, but the scratchy lettering makes people work too hard to read it at a glance. Use a heavier, cleaner font and enlarge the Stinger wordmark so it doesn’t disappear beneath the headline; menace should not require a reading tutor.

Those twin red hornets are doing the heavy lifting, and they look mean enough to start a parking lot argument all by themselves. Hellcat Killer in that scratched brush font is the right amount of unhinged, but it goes muddy fast and nobody reads muddy from a car length away. Kill the tidy little Kia badge under it, because the dealership just crashed a fight poster.

A first attempt with actual teeth, genuinely. The symmetry is the strongest part: the hornets framing the lettering make it feel like one deliberate badge, and the red, black, and white palette gives it exactly the right amount of menace. My criticism is the hierarchy at road distance: HELLCAT KILLER will read first, while the Kia Stinger signature turns into decorative lint. Enlarge the car branding slightly and simplify the thorny letterforms so the joke lands before the traffic light changes. Right now it whispers its own punchline while screaming its threat.

The positive receipt is that the high contrast red and black palette punches hard, and mirroring those Tribute Edition wasps gives the outer edges clean symmetry. Your objective design crime, however, is total typography chaos. Stacking a gritty horror graffiti font right above a sleek cursive script and a geometric corporate logo makes the entire center look like a ransom note fighting with itself.

The positive is that you've got some serious attitude with that "Hellcat Killer" text, that's exactly what a bumper sticker should feel like, bold and unapologetic. The criticism? Those hornet logos are too clean compared to your rough, aggressive text; they need more grit to match that "killer" vibe. The contrast between the sharp hornets and the messy lettering makes it feel slightly disjointed, but the core concept is solid.

The typography is the win: that gritty hand scrawled "HELLCAT KILLER" against the clean red Kia badge is a genuinely smart contrast, and the hornets anchoring both edges frame it like a warning label instead of a car sticker. My criticism is the hornets themselves, because at bumper scale those angular insect heads read as red paper airplanes, and a design that needs explaining is a design that failed. Blow them up and drop the count to one per side, or the only thing getting killed is legibility.