You decide for yourself, but generally shitcoins are regarded as forks without any technical innovation who are not credibly trying to solve any problem or try out a new idea - just make money. They're often meme-themed (though not always, and there are many legitimate projects that are meme-themed).

I've met founders who launched shitcoins which raised a lot of money who acknowledged with no sense of irony that their own token was a shitcoin.

But in general, a shitcoin is a poorly designed project (or just a clone of an existing project) where the founder sells a lot of their tokens and quits immediately after the initial ITO/ICO sale.

Bitcoiners.