I guess I'll just talk about a one point you made because there is no way I am going to talk about everything in that massive OP:
"Moreover, Nintendo has promoted low competitive environments, where shovelware could thrive and sell millions on the Wii. A console with less than 40% of market share was able to collect many more (and far more successful) trash games than PS1 with 70% or PS2 with 75%."
The reason there was so much shovelware on the Wii was twofold:
1. Relatively cheap development costs: Due to the weaker hardware of the Wii, the development costs and development times could be drastically decreased, allowing the creation of games for much lower costs.
2. Extremely large "casual" userbase: More casuals means more people who are likely to buy a bad "shovelware" game.
(EDIT: I would like to add that neither of these things are inherently bad. In fact it could be argued that these things are inherently good for the industry, despite the side effect of increased shovelware)
Now, you also say this implying that this is bad for the industry but I disagree. Lets take WayForward Industries as an example of this. You may know them as the creators of games such as "Shantae" or the Mighty franchise but did you know that they have also made games such as "Despicable Me: Minion Mayhem" and "Space Chimp"? Yup, a fan favorite developer funds its wonderful projects by pumping out what many people would refer to as shovelware.
Shovelware by nature is a cheap way to make a profit and in these times of "one unsuccessful game and you go out of business", I don't see how you can complain about that. Where M$ and Sony provide a space in the market that breeds extremely high dev costs and multimillion dollar projects that could very well bankrupt a company, Nintendo has provided a space that allows significant creative freedom (due to innovative control schemes) as well as lower development costs (due to weaker hardware).
Shovelware isn't evil by nature, in fact, it may be the reason some of the games you love are being developed and published.
