These games are from like the biggest media franchise ever.You can't say they are incompetent if you don't have the knowledge of their situation, how it was handled and what is the standard. Incompetence means they did a bad job but the circumstances can been way more difficult than what you imagine since you have no freacking clue about what those were or how those things happen and so maybe they did a pretty good job with a task that was way harder than you imagine.
you can have 2 different chairs and one looks pretty good and another one a bit rough, and think the second one is out of incompetence but maybe the wood was different, the time they had, the tools they had aviable etc. And so while is fair to say a is a better product than b, saying that whoever made b is incompetent without having any knowledge about how chairs are made is just ridiculous.
The fact they they either (A) were unable to reuse all of the same models that they've been using for years for some reason, or (B) decided to remake the models that they're using from scratch but deliberately only made them identical to 3DS-quality in a Switch game is pathetic no matter how you look at it.