I feel the opposite. N64 and GameCube were bad for Nintendo with the expensive cartridges and kiddie stuff, but Wii was finally something interesting.
Wii U was delayed a year, and came out without any really compelling software or use of the hardware.
As far as "long term damage" goes. That's bullshit, 5 years is a very long time, and that is how long a typical generation is. That is enough time for a company to rise from nothing to become the top company in the game. Just look what Apple did, and what Nintendo themselves did - they went from irrelevancy to the to massively powerful companies very quickly.
Not to mention, the Wii made Nintendo relevant again after 5-10 years of being irrelevant.
I describe myself as a little dose of toxic masculinity.
