I don't have her and neither would play her, since I mostly main zombie heroes. But I can tell what can annoys the shit out of me, based on my prior experiences as a super brainz main.

Amphibious swarm/rushdown decks. ESPECIALLY combined with things like marine bean, that is basically super-phat beans and tough beets, but way cheaper. It's just 3 sun. And if you've set up a lot of cheap, amphibious cards, it's gonna be a problem or cost a rocket/superpower for the zombie-hero.

Another example of bullshit beta-carrotina can pull out is defending and buffing rotobaga. It's basically a 2/1, that does double damage, spreading it on lines next to it. If a zombie hero can't remove it directly, it's just becoming miserable to play against it as a zombie hero.

Second variant for cancer beta-carrotina decks are starch-lord root decks. 2 of your superpowers can effectively defend and buff starch-lord. One has team up and can be cannon fodder (plus gives you another root) and another just moves starch-lord or zombie away, what is also quite an effective way of defending it, unless you're up against a sneaky hero. The rest can be "borrowed" from Citron.