There's a lot of goofs like this in pre-rendered clips in lego games - like in LR2, the chain on the crane that lowers the Xalax sign into place doesn't move. And in one of the Freeway Frenzy rushes in IXS, an NPC in the background loops a walk animation, teleporting backwards to their start position every time. And in LU's NetDevil intro (before it was removed), the minifigure's hip connector knob things poked through his torso and his hand clipped through the lever. And in LRR, Chief was missing his helmet briefly. And in one for the unfinished Bionicle game, Onua's neck came un-hunched for one clip. And in Alpha Team's intro. Dash's headset disappears and re-appears a few times, and Ogel's hands are shown as yellow in the speech bubble from Dash but black when he actually appears. And there was some guy who did a whole dissection of the LEGO Racers intro and even contacted one of the animators about it, he noticed Gypsy Moth's car used a cone piece they already had modeled instead of the proper circular thing on the back (among other things like the horse armor on Basil's car vanishing at one point), and oh god this wall of text was meant to be way shorter but THEY DON'T STOP COMING
ANYWAY yeah there's goofs but saying they're "not made very well" is quite an exaggeration, god knows what sorta tech they were working with, it's obvious how many characters they had to set up and animate (tons) and overall I'd say they look alright for their day