Anon, they're not judging the end result. They're judging the process going on in between.
To go along with the food analogies, imagine you love your mom's spaghetti. It's the most delicious spaghetti in the whole world. You ask her to teach you how to make it and she says you should watch her.
Everything's going fine, until you see from out of the fridge she pulls out some broccoli. You HATE broccoli. "There was broccoli in the sauce?" you asked, and your mom says "There was always broccoli, yeah."
Do you suddenly start hating the spaghetti you love? NO. Because the end result is good.
You're right that it's a matter of tastes and shit, but again, they just don't like it and criticizing the animation techniques themselves because they don't like the style is misguided. They're pointing out the weird transitional drawings, saying THAT'S why it's bad, when no, those are professional techniques that work well when they're fluid.