That consoles need 3rd party support. 

Unfortunately, this study isn't really of any relevance. Most of Wii Us decent games are exclusive, and most games on the other consoles are not. Wii U doesn't get a lot of the good non-exclusives, where as PS4 gets all of them. In addition, when it comes to non-exclusives, none of Wii U's are the definitive version of the game, whereas PS4 has most to all of the definitive versions of non-exclusives. Non-exclusives on PS4 count for a much larger number of games than exclusives on Wii.

This is why the Wii U does not look like an interesting system to most, the library is sparse, and the only way to make it look decent is by really skewing the numbers this way, and that cuts out LOTS of relevant information. It's a meaningless analysis.

WiiU has great exclusives and a few more are coming.
Some indie e-shop exclusive games, like Affordable Space Adventures, Fatal Frame etc. are excellent too

What you're saying makes no sense vs what I said. I said Wii U will be a collector's item and will be considered a great one. And all evidence points to that. Tons of highly rated exclusives, limited availability, and a controller that is exclusive to the console. Everything you said in your first few sentences pretty much says everything that will make it a collectors item.PS4 or Xbox One doesn't matter in this whole equation. Wii U sold limited numbers, physical games are rare, and there are already games that are selling for above msrp. And it'll only get worse.

Its because theres more than just first party titles.

Problem for Nintendo is that there are companies besides Nintendo, Sony and Microsoft who can also make very good games. So even if a console (that has been out for a while longer and that totally depends on first party titles) has the best first party content, doesn't mean that it has the best library. If we compare it to PS4, the absence of The Witcher 3, Bloodborne, Fallout 4, Dragon Age Inquisition, The Division, Destiny etc. makes up for more than one thing. And if we are going to include add ons, might as well include The old hunters DLC of Bloodborne and Driveclub Bikes. And if we are going to count smaller exclusive games for the Wii U, you might as well count games as Resogun for PS4.

This list is so full of double standards it is indeed cringe worthy, btw WHERE THE HELL IS ORI, forza Horizon 2 and probably a few more.

People buy a console for it's entire library, if you miss all major third party games your library isn't all that great simple as that. And the list is full of double standards like including Fast Neo but not Resogun. Including Luigi U, but Driveclub bikes and The old hunters expansion pack. Fogetting Forza Horizon 2 and Ori. It's obvious this list is very tolerant towards exclusive Wii U games, while litteraly forgetting titles on Xone and PS4 which should be on this list.

But the Wii U has the best first party library that much is true, although within 3 months Playstation will catch up quite a bit. 

If you look sale numbers of software on PS4/X1 you will that people mostly buy 3rd party games on those platform, for instance from 20 best selling PS4 games there only 2 exclusive games (actually not real exclusive because both are ported PS3 games), while on Wii U side from 20 best selling games you have just one game that isn't exclusive (ZombiU), also you can compare best selling games on 3DS and Vita. People still buying Nintendo platforms for exclusive games on first place, that isn't case with PS4/X1. PS4/X1 proves that this gen 3rd party are stronger than ever before, while exclusive games are not that important any more, at least for those platforms.

This

What is affecting the Wii U the most is the extremely high amount of games that you CANNOT play on it.

To be fair what serious third party support has a Nintendo console ever had. But there are still plenty of people like me who choose a PS4 over a Xone because of games like Uncharted. But yes people buy the best (advertised) games available on their platform and in general don't give a shit whether they are exclusive or not. Problem with Nintendo is the fact you really don't have much third party content to choose from anyway. Some third party games on gamecube like Resi 4 (temporally exclusive) sold quite well right.