The Switch is fantastic for what it is. Sure, it's anemic and old, but it's a creative design that more or less created a whole product category and allows for very creative gameplay.
They did push their luck a bit with BOTW and especially TOTK, regarding performance, sure. But most of the time, you really don't need incredible processing power to play a Nintendo game. They're overdue for a Switch 2 (I suspect they planned to release that much earlier but a combination of the pandemic and higher sustained sales than anticipated changed their plans), but I really don't think most of their consoles can be considered mistakes.
IMO Nintendo brings something different and it's very much okay that it exists.
What I'm actually doubtful about is Xbox and Sony. Those are just PC-controller combos, made cheap through standardisation, high volumes and loss-leader tactics, essentially. Microsoft and, to a lesser but similar degree, Sony, are the ones I'm not convinced provide the world with much value by making consoles.
Assuming it's just like a Steam Deck without the screen, how would that compare to popular controllers like consoles first-party ones or 8bitdo's offerings?