Yeah, these things are total eye vomit. I like the idea of hybrid fossils, but to make them so horrifying and make it look like they're in constant pain instantly puts me off to them. If you want to make them look like mistakes, then fine, but at least make it look like they won't flat out die in 5 seconds.
I really have to wonder how these designs even got greenlit. Game Freak has spoken about their process in creating and approving Pokemon designs, and they've said that the designs need to be endearing enough to be appealing to kids. So how do these designs qualify? If even the older fans are horrified by these designs, you can only imagine how the kids will react to witnessing these abominations.
Well, it is a matter of opinion. I like all four of them, and if they made plushes of them, I'd get them. They remind me of that human-bird chimera in the
South Park episode in which Stan joins PETA. When Stan meets him, he's just there in the corner asking Stan to kill him. Later in the episode, the chimera geta ahold of a gun and shoots himself in the head.
There's also how kids are terrified of different things than adults. (And in fact, kids sometimes find funny things that would terrify adults.) Clowns are a good example, where adults find clowns either creepy or obnoxious, but kids are often quite fond of clowns. Some kids are afraid of them too, but illustrations of clowns are used non-ironically on a lot of candies and snacks where I live, and there are clowns who show up at events like farmers markets and county fairs here that the kids
love. (Apparently, Nintendo encountered this head-on with Lola Pop in
ARMS, in which the kids took to her while the adults largely found her offputting.)