>>119253331I'm not an animator by ANY means, but here are my thoughts:
I think the shading is part of it, as in, there isn't any so it all just looks "flat", the movement isn't very weighty and looks kind of stiff like there's no momentum or build up, everything moves at the same (low) framerate with no inbetweens to make them look more fluid. Also the way the dummies hit the floor and instantly stop moving (like there's no bounce or anything, they just freeze on the frame they are in full contact with the floor) looks bad. I also think the backgrounds are too clean and simple to where the characters don't really look like they belong in them, the characters are also lit like they aren't even there, with that flat, even lighting with no shading, so they stand out even more and it just looks like they were superimposed onto an unrelated background, which I get is basically what animation is, but you know what I mean.
I think a lot of these are nit picking, but all these smaller things add up and make things look weird and "off" without you actively noticing them
