If you're anti-shorts, you could also choose to send a message to the creators by not watching their shorts. If they previously made long form but have switched to shorts, they're concerned with views, so you deny them the views.

Of course this may have little impact since so many people have no self-control and the gains from shorts may outweigh loosing your views, but it's still something. Enjoy the warmth of angry spite and move on.

Vote with your wallet, your clicks, and be the change you wish to see.

I mean... I'm against short-form videos. I'm not against YT shorts, because they (mostly) aren't short-form videos. They're just vertical videos that trick people used to short-form videos into thinking they'll be getting short-form videos, but (mostly) give them long-form videos. (Or... medium form? What do you call a two-to-three-minute-long video that thoroughly answers one very specific question?)

Especially the creators who've "previously made long form but have switched to shorts" — they're not making short-form videos. They're just making long/medium-form videos in portrait now.

IMHO, if something markets itself as a problematic thing, but doesn't actually deliver on the problematic part, then it isn't problematic. (E.g. convincing kids that frozen peas are "pea candy" isn't problematic. You're not making them like "candy." You're making them like peas!)