Gameplay and graphics are not connected. You can have great gameplay and poor graphics or poor gameplay and great graphics, etc. You can like one without liking the other. You are simply making an "reductio ad absurdum" argument, and not in good faith.
I feel very similarly to that poster. Growing up with NES, SNES, and N64, and being strongly in the Nintendo camp, I felt very let down, basically betrayed, by how cartoony Gamecube games were, and generally worse than their N64 predecessors (Mario, Zelda, Mario Kart), not to mention the strange controller, and weaker 3rd party games. I have been waiting for Nintendo to take a console seriously for once, i.e. without gimmicks, ever since, so therefore they get no money from me.
I understand many people enjoy motion controls and portable gaming, but I am not one of them. Perhaps when my children are old enough to play videogames I will feel differently about modern Nintendo, but today, they don't really offer anything of interest.
On topic, Nintendo's next gimmick will likely return to wearables, such as utilizing a Fitbit like device for each limb to map to onscreen character control.