absolutely, positively one of the worst films EVER

Don't you threaten me, buddy.

Oh, alright. I stand legitimately challenged. But I certainly would put Grinch into that top-of-bottom group (which you can already see includes a special subcategory of films by SNL alums based on their SNL characters).

I've seen a ton of bad films, actually. In some cases I have kind of an affection for them (Ed Wood stuff, for instance). And in any ranking, I try to eliminate those that were going for badness and knew it (Attack of the Killer Tomatoes, for instance) or those where the badness was largely connected to something weird or specific about the larger culture (atomic dramas of the '50s, beach movies of the '60s, etc.); for those, the badness has to rise above the level of others in the same [cough] genre in some way. (I give you just about anything with Arch Hall Jr.)

To me, the bottom of the slime bucket almost always involves a project like Grinch (or several of those you mention above), where the project had truckloads of money and spent it all on some tired formula, and the spenders were people of limited ability and/or concern with doing anything worthwhile, usually because (at least partially because) they knew they could rely on parents to bring their kids to it, or SOs to bring their SO to it, or whatever. With a lot of these films, you can hear the conversations that went on between the suits in the conference rooms, about demographics and focus-groups results and so forth. Just life-sucking, is what it is.

It also helps if you add a generous layer of predictable poopoo-caca jokes or other kinds of tedious grossout or vulgar-for-vulgarity's-sake stuff.

And with Jim Carrey, you have special heights of badness (no, I don't think everything he's ever done is in this category), simply because his response to terrible material and a terrible project is to sell it even harder, to go all-in and then start pulling his rings and shoes off and throw them in the pot too, because he just knows he's that funny and all the project needs is his personal shtick (see Eddie Murphy disease).

I've only seen Little Nicky in that list. It had its funny moments and stupid moments. Sandler has gotten more annoying too. But the Grinch is 100 times worse.

As for Jim Carrey, I remember when I thought his movies were really funny and entertaining. Now I think he's funny as a guest on talk shows or as a standup, but I just can't watch a lot of his movies. Remember on the 90s when we thought Ace Ventura and the Mask were actually funny? They are mostly annoying now! The only one I can watch over and over again is Cable Guy. I hate Broderick's gf though, she's so fussbudgety and has to have everything perfect that it's irritating!