When your only argument to justify your point is that "Nintendo is dumb and can only make stupid decisions", you're doing it wrong.
Again, if they'd deliberately take the decision to make less money than before, they wouldn't have lasted 130 years in the market.
The point isn't whether they last, but whether they leave money on the table. I argue that they have obviously done so.
1. Failing to capitalize on their huge Wii install base. My weakest point. After getting a huge install base, they let the system be filled with shovelware.
2. Stupid online/account system. Just have a simple account system and don't tie purchases to a system. Why the hell can't I play the Gargoyle's Quest game or Steamworld Dig that I bought on 3DS on my Switch? Friend codes?
3. Never putting games on sale. I engage with the system less when each purchase sets me back $60-$80 CAD before tax. I can get Shadow of Mordor, which won GOTY awards for $6 right now for christsakes. I have a Switch but don't see myself playing it outside of when entertaining.
4. Confusing system iterations that gated access to some games. DS, DSi, 3DS, new 3DS.
5. Wii U as a name. Good plan, man.
6. Underestimating demand for the Classic NES and refusing to make more. That was an easy $80 of my money that they will never get.
7. The most persnickety point and least relevant... fading grass in Animal Crossing. Yes, make traversing my town to actually play the game make my town uglier.
8. No virtual console on the Switch. I would have spent at least $20 by now. Instead, nothing. With my gaming budget being what it is and the need for a case and screen protector, I might have a game for the system in August.