I dislike the Wii because that was the era where Nintendo decided that 1-2 years was about as much effort as they could be bothered to put into the thing. It was the era of Nintendo taking AWAY options in their games to shoe-horn motion control in that never worked outside of the light gun games.
"Hey! Let's make this DKC game about pin-point platforming, and then let's force you to waggle the Wiimote to perform one of the most critical moves in the game in terms of timing!"
"Hey! Let's make a Metroid game you're required to play like an NES game...because."
**** like that was all over Nintendo's output in the Wii era, and because only Nintendo games sell on Nintendo consoles, that's what all the 3rd parties did, too.
In terms of Nintendo of America, though, by far the worst thing about the Wii era was Reggie's reluctance to localize games, both in a timely manner as well as localizing them at all. The Operation Rainfall games are the most well-known in that regard, but they weren't the only ones. We missed out on the Wii Fatal Frame 2 remake (as well as Fatal Frame 4, but no one got that game outside Japan) and Disaster: Day of Crisis, both games that were localized in Europe and could have just been released over here had Reggie given a damn. I had to import them and hack my Wii & Wii U to play them. 3rd parties got next to no support from Nintendo, too, outside a few notables.
If the Wii was awash in 1st party software, that would be one thing, but Nintendo of America basically abandoned the Wii after 2010, where it limped along until the Wii U came along in 2012 to give it a mercy killing (before it, itself, was abandoned a year later in favor of saving the 3DS).
The Wii era is one of complacency on the part of Nintendo, and I loathe it despite it introducing several things I wish Nintendo still did like the Virtual Console. I have an entire shelf of Wii games I can still enjoy today, but those were some bare-bones years when the casuals moved on (as they ALWAYS do) if you were a dedicated player.